The Deep Underground Neutrino Experiment (DUNE) is dedicated to addressing several key questions of particle physics and astrophysics: the preponderance of matter over antimatter, the dynamics of supernova neutrino bursts, and whether protons decay. DUNE’s liquid argon time-projection chambers for neutrino physics have created a need for new approaches to pattern recognition to fully exploit...
Skipper-CCDs are special CCD detectors sensitive to single electron excitations to the silicon valence band, and thus sensitive to very low nuclear recoils. This opens up the unique opportunity of detecting coherent elastic neutrino nucleus scattering at comercial nuclear reactor powerplants. To exemplify the physics potential and limitation of these experiments, we study how background rates...
The COHERENT Collaboration recently made the first observation of the Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) process by using neutrinos produced in the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory. CEvNS measurements are expected to have significant impact on many areas of physics, which has motivated COHERENT to attempt precision measurements on a variety of...
MicroBooNE has accumulated data in a 1E21 POT neutrino beam over five years to test the excess of low energy electron neutrino-like events observed by MiniBooNE. To this end, we have explored the use of a new hybrid analysis chain that includes both conventional and machine learning reconstruction algorithms to identify events with the exclusive 1-proton-1-electron signal topology. The...
In series of works resonance excitation of the $^8$$^3$Kr first nuclear level (E = 9.4 keV) by solar axions formed via the Primakoff mechanism is sought. The $\gamma$- and X-ray photons, the conversion and Auger electrons arising from the excited-level relaxation are detected with a gas proportional counter of a low-background detector in the underground Baksan Neutrino Observatory. The...
A design option considered for the inner tracking volume of the System for on-Axis Neutrino Detection (SAND) in DUNE is a single Straw Tube Tracker (STT). The STT is designed to offer a control of the configuration, chemical composition and mass of the targets similar to the one achieved in electron experiments. Thin layers (~1-2% radiation lengths) of interchangeable target materials (mostly...
The COHERENT collaboration measures coherent elastic neutrino-nucleus scattering (CEvNS) in multiple materials to map the neutron number squared dependence predicted by the Standard Model. The collaboration will deploy a ton-scale NaI[Tl] scintillation crystal based modular detector array, initially with about 2 T of detector material at Oak Ridge National Laboratory. Sodium is the lightest...
NOvA is a world-leading long-baseline neutrino oscillation experiment. Probes of neutrino and antineutrino oscillations in the NuMI beam enable precise measurements of the atmospheric oscillation parameters, determination of the mass ordering, and constraints for the CP-violating phase. Additionally, NOvA is probing sterile neutrino mixing and setting stringent constraints on sterile model...
Since the discovery of a diffuse astrophysical neutrino flux by the IceCube Neutrino Observatory, many sources have been studied as possible progenitors of high-energy neutrinos. In particular, gamma-ray bursts (GRBs) have been considered as possible neutrino sources due to their extremely high energy output. Several analyses with IceCube data have set strong limits on prompt neutrino...
The MAJORANA DEMONSTRATOR is a neutrinoless double beta decay experiment consisting of two modules of p-type point contact germanium detectors deployed in a graded shield at the 4850’ level of the Sanford Underground Research Facility. A low background index has been achieved at the $0\nu\beta\beta$ Q-value, and low backgrounds above 5 keV have enabled searches for other beyond the standard...
The XENON1T experiment searches for Weakly Interacting Massive Particles (WIMPs) with a dual-phase xenon time projection chamber (TPC). To extend its physics reach, the efforts of the XENON collaboration are directed toward exploring other detection channels. For this purpose, considerable work on the signal reconstruction and data analysis has been done to extend the available energy range up...
The KATRIN experiment is designed to measure the effective electron anti-neutrino
mass $m_{\nu}$ by investigating the energy spectrum of tritium $\beta$-decay. This
poster presents one of the analysis strategies pursued by the collaboration which is
based upon Monte Carlo propagation of uncertainties. It was already successfully applied
to the first neutrino measurement campaign which took...
Motivated by the no-show of New Physics signals coming from BSM searches in the post-Higgs era of the LHC, we study the scalar sector of the original electroweak-scale right-handed neutrino model, which includes Majorana masses and new mirror fermions having masses in the EW scale. This scenario successfully connects the see-saw mechanism, strong CP and DM problem and contains distinguished...
NEOS experiment, being carried out in the tendon gallery of the Hanbit reactor unit 5, detects electron anti-neutrinos from the reactor core at 24 m distance to search for sterile neutrinos. The first phase of NEOS experiment with 180-day data (2015-2016) did not show any strong evidence of active-to-sterile neutrino oscillation. NEOS phase-II operating since Sept. 2018 took 500 days of...
To constrain the contribution of source populations to the observed neutrino sky, we consider isotropic and anisotropic components of the diffuse neutrino data. We simulate through-going muon neutrino events by applying statistical distributions for the fluxes of extra-galactic sources and investigate the sensitivities of current (IceCube) and future (IceCube-Gen2 and KM3NeT) experiments. The...
ANTARES and Baikal-GVD are both Cherenkov neutrino telescopes located in
the Northern Hemisphere. As a consequence, their fields of view overlap allowing
for a combined study of the sky. Since December of 2018, Baikal followed
up a total of 25 ANTARES alerts, and while no prompt coincidence was found,
a cascade mode search showed some events falling within an angular distance of
less than...
In this contribution the first measurement of the atmospheric flux of electron neutrinos in the energy range between 50 GeV and 100 TeV made with the ANTARES neutrino telescope is presented. This analysis exploits the large data sample collected in more than 10 years of data acquisition and the development of a new event selection strategy.
Using a Boosted Decision Tree, which combines...
A search for small scale anisotropies in the arrival directions of neutrino candidates detected by the ANTARES detector between January 29, 2007 and December 31, 2017 is presented.
Different samples of sources are considered: a) a clean sub-sample of the Fermi 3LAC catalog of blazars, b) a star-forming galaxy catalog, c) a sample of giant radio-galaxies, d) an jet-obscured AGN population,...
The IceCube Neutrino Observatory instruments a cubic kilometer of ice at the South Pole to detect atmospheric and astrophysical neutrinos. IceCube consists of a 3D array of 5160 optical modules which detect light from relativistic charged particles resulting from neutrino interactions in the ice. This can be used to reconstruct the neutrino’s energy and direction, but becomes particularly...
The Argon Resonant Transport Interaction Experiment (ARTIE) was recently performed at the Time-of-Flight neutron beam at Los Alamos National Laboratory. ARTIE makes a new measurement of the total cross-section of neutrons on natural argon between 40-70 keV. In this energy range, the ENDF evaluation predicts an anti-resonance in the Ar-40 cross-section near 57 keV. However, this is not...
ARIADNE, a state-of-the-art 1-ton dual-phase LArTPC, featuring game-changing photographic readout, utilising ultra-fast photon sensitive TPX3 cameras, to image the secondary scintillation light produced in THGEM holes. ARIADNE underwent testing at the CERN T9 beamline, becoming the first dual-phase LArTPC with photographic capabilities to be positioned at a charged particle beamline,...
The NOvA neutrino experiment, designed to measure electron neutrino
appearance in a muon neutrino beam, also has a wide-reaching
astrophysics program as a result of its unique size, granularity and
position. Unlike previous long-baseline neutrino experiments, the 14kt
NOvA far detector is on the surface, which enables a search for a
low-mass monopole component of cosmic rays. Despite...
We study the neutrino flux produced by the stopped muon in
matter to predict the lower energy atmospherinc neutrino flux
with better accuracy below 100 MeV.
The DeepCore sub-array within the IceCube Neutrino Observatory is a densely instrumented region of Antarctic ice designed to observe atmospheric neutrino interactions above 5 GeV, via Cherenkov radiation. At these energies, Earth-crossing muon neutrinos have a high chance of oscillating away to tau neutrinos. These oscillations have been previously observed in DeepCore through both muon...
The atmospheric neutrino flux represents a natural source that can be exploited to infer properties about Cosmic Rays and neutrino oscillation physics. The JUNO observatory, a 20 kt liquid scintillator detector currently under construction in China, will be able to detect the atmospheric flux, given the large volume and the excellent energy resolution. In this study, a sample of atmospheric...
The nonthermal effects on the Shannon entropy for the atomic states are investigated in astrophysical Lorentzian plasmas. The Shannon entropies for the ground and excited states in astrophysical Lorentzian plasmas are also obtained as functions of the spectral index, effective screening lengths, and plasma parameters including the radial and angular parts. It is shown that the nonthermal...
Project 8 aims to determine the absolute neutrino mass via tritium $\beta$-decay using Cyclotron Radiation Emission Spectroscopy (CRES).
Good energy precision, high statistics, and well-controlled systematics will enable $m_\beta \leq$ 40-meV sensitivity.
We have achieved eV resolution at 17.8 keV and will instrument our fiducial volume with spatially-resolving antennae to minimize pileup....
nEXO is a next-generation experiment aimed to search for neutrinoless double beta decay ($0\nu\beta\beta$). The observation of $0\nu\beta\beta$, a lepton number violating process, would imply that neutrinos are Majorana particles. Using a liquid xenon time projection chamber containing 5 tonnes of xenon enriched to 90\% in $^{136}$Xe, nEXO is projected to reach a half-life sensitivity of...
CUPID-Mo is searching for neutrinoless double beta decay with enriched Li$_{2}$$^{100}$MoO$_4$ scintillating crystals, operating at the Modane underground laboratory. During the first physics runs, started at the beginning of 2019, CUPID-Mo collected an exposure of more than 2 kg.y. The data validates the high level of radiopurity of the crystals and the excellent alpha-particle rejection.
...
The objective of the KATRIN experiment is the measurement of the effective electron neutrino mass with an unprecedented sensitivity of 0.2 eV/c$^2$. In the ultra-precise measurement of beta-electrons from tritium-decays, a non-zero neutrino mass would be indicated by a minute deviation of the beta-spectrum close to the endpoint at 18.6keV. This is measured with a 24m long electrostatic...
KamLAND-Zen is a neutrinoless double beta decay $(0\nu\beta\beta)$ search experiment using $^{136}$Xe. Taking advantages of the low-background environment of KamLAND, we realize the most sensitive $0\nu\beta\beta$ search.
While $0\nu\beta\beta$ is a pure $\beta$ event, the backgrounds such as $^{214}$Bi and spallation products emit $\gamma$-rays. Therefore, particle identification(PID) is...
The SoLid (Short baseline Oscillation search using a Lithium-6 detector) experiment is devoted to study neutrino oscillations in order to investigate the observed deficit in the flux of antineutrinos measured by several neutrino experiment located at short-distance from the reactor compared to theoretical calculations. SoLid uses a novel technology which consists in a highly segmented plastic...
The next generation of neutrinoless double beta decay searches aims to reach sensitivities in the half-life of the process up to $10^{28}$ years. This will require tonne scale detectors with almost no background in their region of interest, which represents a large improvement with respect to current technologies. One of the most interesting solutions is the possibility of tagging the daughter...
New ultra-sensitive technologies are likely to be required for an observation of neutrinoless double beta with lifetimes in excess of the limits set by existing experiments. A promising avenue to a zero-background experiment is the identification of the daughter ion produced in the decay. The NEXT collaboration is developing techniques to collect and image single barium ions that result from...
The proposed nEXO experiment is searching for neutrinoless double beta decay (0νββ) in 136-Xe in a tonne-scale liquid xenon TPC. If observed, 0νββ will reveal the Majorana nature of neutrinos and violation of lepton number conservation. Searches for such extremely rare events require excellent background suppression and rejection methods to achieve high sensitivities. The identification or...
The origin of the small neutrino masses and the BAU can be explained using seesaw mechanism and leptogenesis as phenomenological benchmarks. Since type II seesaw suffers from direct detectability in any foreseeable experiment, to overcome this, we constructed the inverse and linear seesaw models. The inclusion of the right handed Majorana fields can serve as extra source of CP violation in the...
Project 8 aims to determine the absolute neutrino mass scale from a tritium beta spectrum using Cyclotron Radiation Emission Spectroscopy (CRES). Bayesian analysis is suited for direct mass measurements because it incorporates non-Gaussian features—like the mass's physical bound at zero—without invoking approximate interval building techniques. Bayesian methods also separate inference from...
The popularity of Deep Learning (DL) has grown exponentially in all scientific fields, included particle physics. The amount of data and its complexity has grown as well, and the computing power required to perform inference can nowadays hardly be managed. Central Processing Units (CPUs) are affordable but their ability to run Artificial Intelligence (AI) is very limited. In recent years,...
The Borexino detector, located at the Laboratori Nazionali del Gran Sasso in Italy, is a liquid scintillator detector with a primary goal to measure solar neutrinos. The pp fusion chain has been measured in Borexino with an outstanding precision through the detection of pp, pep, $^{7}$Be, and $^{8}$B neutrinos. It is well motivated by standard solar models that around 1 per cent of the...
Neutrinos offer a window to physics beyond the Standard Model. In particular, high-energy astrophysical neutrinos, with TeV-PeV energies, may provide evidence of new, "secret" neutrino-neutrino interactions that are stronger than ordinary weak interactions. During their propagation over cosmological distances, high-energy neutrinos could interact with the cosmic neutrino background via...
The proposed ICAL detector at the INO facility offers an unparalleled window to probe various beyond the Standard Model (BSM) scenarios by observing atmospheric neutrinos and antineutrinos separately over a wide range of energies and baselines. We study several interesting BSM scenarios using 50 kt ICAL such as: a) Non-Standard Neutrino Interactions (NSIs), b) Flavor-dependent Long-Range...
A potential source of backgrounds in a ton-scale $^{76}$Ge-based neutrinoless double-beta decay program could arise from particle interactions occurring near the surfaces of high purity germanium (HPGe) detectors. The Collimated Alphas, Gammas, and Electrons scanner (CAGE) is a test stand that allows for in-depth studies of surface events by using vacuum-side, collimated radiation sources to...
SNO+ is a multipurpose liquid scintillator experiment based at SNOLAB, Canada, with a primary focus to search for neutrino less double beta decay of 130Te. The experiment is currently approximately half filled with liquid scintillator and taking commissioning data 24 hours a day. A variety of calibration methods are employed in SNO+ to ensure that the charge, timing, occupancy and systematic...
STEREO is a coarsely segmented, Gd-loaded liquid scintillator calorimeter studying antineutrinos produced by the compact reactor core, highly enriched in $^{235}U$, of the Institut Laue-Langevin in Grenoble (France). The experiment has been designed to test the light sterile neutrino explanation of the Reactor Antineutrino Anomaly (RAA) by comparing the neutrino energy spectra recorded by its...
CUPID-Mo is a demonstrator, located in the Modane underground laboratory, for the future ton-scale double beta decay experiment CUPID. CUPID-Mo uses an array of 20 100Mo-enriched Li2100MoO4 low-temperature scintillating bolometers. The detectors exhibit extremely high energy resolution (FWHM~6 keV for 2615 keV gamma-quanta), but a precise calibration and an accurate determination of the...
The SuperNEMO experiment aims to test the Majorana nature of neutrinos, looking for the neutrinoless double beta decay.
The final detector's goal is to reach a sensitivity of $10^{26}$ years on the $^{82}$Se $0\nu\beta\beta$ decay half-life.
The SuperNEMO demonstrator is under construction with $6.23$ kg of $^{82}$Se.
Decay electrons are tracked in a wire chamber, and their energies...
The Jiangmen Underground Neutrino Observatory (JUNO) central detector (CD) would be the world’s largest liquid scintillator (LS) detector with an unprecedented energy resolution of $3\%/\sqrt{E(MeV)}$ and an energy nonlinearity better than 1% to achieve multiple physics goals, including determining neutrino mass hierarchy, measuring solar neutrino, detecting supernova neutrino, etc. In order...
Situated in the Vale Creighton mine at 2km depth, the SNO+ experiment is entering a critical time as it is now contains nearly half of its planned 780 tonnes of linear alkylbenzene. In the coming year, the experiment will begin to add the Tellurium isotope required for its planned neutrinoless double beta decay measurements. Data collected in the meantime will be used for solar and reactor...
MicroBooNE is the first phase of Fermilab's Short Baseline Neutrino (SBN) Liquid Argon Time Projection Chamber (LArTPC) programme. This poster presents the characterisation of electron neutrinos in a muon neutrino beam with the LArTPC detector technology. The Booster Neutrino Beam has an energy peaking around 1 GeV and an electron content of approximately 0.5%. The analysis investigates...
Separation of Cherenkov and scintillation signal for electron events extending below 1MeV is demonstrated on a bench top scale. This is achieved using highly efficient slow fluors, with linear alkylbenzene (LAB) as the primary solvent, to create liquid scintillator solutions with rise times of several ns or more and decay times of tens of ns. Such mixtures show a clear timing separation...
Theia is a proposed multi-kiloton scale advanced optical neutrino detector with a broad range of physics goals. By employing water-based liquid scintillator (WbLS) or a similar technology, Theia will be able to harness the high light yield of liquid scintillator detectors with the direction reconstruction capability of water Cherenkov detectors. One physics goal is to leverage these...
We present a study for the coherent pion production in neutrino-nucleon scatteing in the resonance region using the formalism based on partially conserved axial current (PCAC) theorem which relates the neutrino-nucleus cross section to the pion-nucleus elastic cross section. We calculate the differential and integrated cross sections for neutral and charged current coherent pion production in...
In the near future, the SBN and DUNE experiments will both leverage liquid
argon time projection chamber (LArTPC) technology to pursue high-precision
measurements of neutrino oscillations. Interpretation of the results from these
efforts will require a detailed understanding of neutrino-argon scattering
cross sections, which are currently subject to significant theoretical
uncertainties...
Precise modeling of neutrino interactions on nuclear targets is essential for neutrino oscillations experiments. The modeling of the energy of final state particles in quasielastic (QE) scattering and resonance production on bound nucleons requires knowledge of both the removal energy of the initial state bound nucleon as well as the Coulomb and nuclear optical potentials for final...
We present complete predictions for the interactions of energetic neutrinos with matter as they propagate through Earth towards large-volume detectors. Our results are based on state-of-the-art calculations for the high-energy neutrino-matter interaction cross-sections. In addition to the dominant interaction process, deep inelastic scattering off quarks and gluons, we include the relevant...
MicroBooNE, a Liquid Argon Time Projection Chamber with an active volume of 85 metric tons, is located on the Booster Neutrino Beam at Fermilab and has been collecting data since fall 2015. One of its primary physics goals is to investigate the low-energy excess (LEE) of events observed by the MiniBooNE experiment in their measurement of charged current quasi-elastic-like electron neutrino...
The first three flights of the ANITA experiment resulted in two enigmatic detections. These events, if interpreted as upward-going extensive air showers, are compatible with the signature of tau decay from an ultra-high-energy tau neutrino interaction. However, the arrival of these events from well below the horizon is in extreme tension with limits on isotropic cosmogenic neutrino fluxes....
Recent measurement of coherent elastic neutrino-nucleus scattering (CEvNS) process by COHERENT collaboration has opened a new portal of exploring various BSM processes. The major uncertainty in CEvNS stems from nuclear constraints on form-factors, and hence any experimentally measured deviation from the SM number of events can either be attributed to a lack of knowledge of the nucleon...
Liquid Argon Time Projection Chambers (LArTPCs) are an important technology in the field of experimental neutrino physics due to their exceptional calorimetric and position resolution capabilities. The MicroBooNE experiment is utilizing LArTPC technology to investigate the MiniBooNE low-energy excess, which could be either electron-like or photon-like in nature. On the photon-like side,...
The ANtarctic Impulsive Transient Antenna (ANITA), a NASA long-duration balloon
payload completed its fourth flight in December 2016 with 28 days of flight
time. We present the results of two separate blind analyses searching for
Askaryan radio emission in the polar ice from ultra-high-energy neutrino
interactions. The more sensitive analysis, with a better expected limit, had...
COSINUS (Cryogenic Observatory for SIgnatures seen in Next-generation Underground Searches) has the aim of detecting Dark Matter via elastic scattering off nuclei ina NaI target crystal which is the core of the detector. The NaI crystal is kept at ~10 mK and it is operated as a low-temperature calorimeter. The deposited energy is precisely reconstructed from the phonon signal. By facing to...
For a surface Liquid Argon Time Projection Chamber (LArTPC) to detect neutrino interactions, the rejection of the cosmic background is challenging and critical. We introduce a superior cosmic background rejection procedure applied in MicroBooNE based on the Wire-Cell 3D event reconstruction techniques. The foundational reconstruction techniques include the 3D imaging and clustering of the TPC...
We present a study of cosmic proton interactions with air in the atmosphere using COsmic Ray SImulation for KAscade (CORSIKA) code. The CORSIKA simulation uses various hadronic interactions models for the secondary particle production in the air. The secondary particles mostly pions and kaons decay to muons which finally reach the Earth. The muon energy and zenith angle distributions are then...
The Deep Underground Neutrino Experiment (DUNE) aims to make precise measurements of long-baseline neutrino oscillations over a 1300 km baseline. The DUNE Far Detectors will be 10 kton Liquid Argon Time Projection Chambers (LArTPCs) which require a dedicated prototyping effort (ProtoDUNE), currently ongoing at CERN.
Two LArTPC technologies are being explored, Single Phase and Dual Phase,...
As the SBN far-detector, the ICARUS liquid argon time-projection chamber will operate at shallow depth and therefore be exposed to the full surface flux of cosmic rays. This poses a problematic background to the electron neutrino appearance analysis. A direct way to reject this background is to surround the cryostat with a detector capable of tagging incident cosmic muons with high efficiency,...
We study the observable effects of a secret active-sterile interactions, mediated by a pseudoscalar, on the expected flux of cosmogenic neutrinos. The results show that for masses of sterile neutrinos and pseudoscalars of hundreds MeV, necessary to evade cosmological, astrophysical and elementary particle constraints, the presence of such new interactions can significantly change the energy...
Local measurements of the Hubble constant currently disagree with the high-precision value that is inferred from the CMB under the assumption of a ΛCDM cosmology. The significance of this tension clearly motivates studying extensions of the standard cosmological model capable of addressing this outstanding issue.
In this poster, based on ArXiv:1909.04044, I will show that the Majoron - a...
An accurate measurement of the Solar Neutrino Flux from CNO cycle can shed light on the so called “solar abundance problem”: new determinations of the photospheric abundances of heavy elements indicates that the Sun metallicity is lower than previously assumed, however Solar Models incorporating lower abundances are no more able to reproduce the helioseismic results. We propose a method for...
At the present time even the most sophisticated, multi-dimensional simulations of core-collapse supernovae do not (self-consistently) include neutrino flavor transformation. This physics is missing despite the importance of neutrinos in the core-collapse explosion paradigm. Because of this dependence, any flavor transformation that occurs in the region between the proto-neutron star and the...
Liquid Argon TPC (LarTPC) detectors have a unique capability in measuring low energy neutrino signals. In this work, we study the DUNE sensitivity to the CP-violation phase using sub-GeV atmospheric neutrinos. LarTPCs would reconstruct with high accuracy the track and the energy of low-energy charged particles, allowing to infer the energy and direction of sub-GeV neutrinos with unprecedented...
NOvA is a long-baseline neutrino experiment at Fermilab that studies neutrino oscillations via electron neutrino appearance and muon neutrino disappearance. The oscillation measurements compare the Far Detector data to an oscillated prediction which combines Near Detector (ND) data and the current understanding of neutrino interactions through simulation using GENIE. By tuning the cross...
MicroBooNE and SBND are liquid argon time projection chambers (LArTPC) with 85 ton and 112 ton of active mass, respectively, located along the Booster Neutrino Beamline at Fermilab. Both experiments use the accelerator signals in coincidence with the scintillation light produced when particles interact with the argon to trigger the readouts of the detectors. Furthermore, both experiments aim...
The Borexino experiment, located at Laboratori Nazionali del Gran Sasso, and widely known for its rich Solar Neutrino physics program, has entered its 13th year of data taking. The detector, at present in its high-purity Phase III data taking, was thermally insulated in order to improve the fluid stability. As an outcome, quality of the data has significantly increased leading to new levels...
The goal of the Electron Capture in Ho-163 (ECHo) experiment is the determination of the electron neutrino mass by analyzing the electron capture (EC) spectrum of Ho-163. Metallic magnetic calorimeters operated at low temperatures, in which the Ho-163 has been implanted, have been selected to conduct a high resolution, high statistics, and low background calorimetric measurement of the Ho-163...
NOvA is a long-baseline neutrino oscillation experiment that consists of two functionally equivalent detectors and utilizes Fermilab's NuMI beam. NOvA uses a convolutional neural network for particle identification with a validation process that includes several data-driven techniques. Muon-Removed Electron-Added studies involve selecting $\nu_\mu$ charged current candidates from data and...
The Daya Bay reactor neutrino experiment is the first experiment that measured a nonzero value
for the $\theta_{13}$ neutrino mixing angle in 2012. Antineutrinos from six 2.9
GWth reactors are detected in eight functionally identical antineutrino detectors
deployed in two near ($\sim 500$ m) and one far (1648 m) underground
experimental halls. The near-far arrangement of antineutrino...
This poster will present the latest results of the reactor antineutrino flux and spectrum measurement at Daya Bay. The Daya Bay Reactor Antineutrino Experiment employs eight antineutrino detectors in three different experimental halls to detect reactor neutrinos coming from six 2.9 GW$_{th}$ commercial nuclear reactors. The latest absolute reactor antineutrino flux measurement with an improved...
In this work, we obtain the Daya Bay and RENO confidence regions for the neutrino oscillation mixing angle $\sin^{2}(2\theta_{13})$ and the effective squared mass difference $\Delta m^2_{ee}$ in the three neutrino mixing model. This through a global statistical analysis from the public experimental data of the three LBL reactor experiments, Daya Bay, Double Chooz and RENO. Our single results...
Tau appearance from neutrino oscillations of atmospheric muon neutrinos is studied by the DeepCore subarray, the densely-instrumented region of IceCube, an ice-Cherenkov neutrino detector 1.5 kilometers below the surface of the South Pole. These studies probe the unitarity of the PMNS matrix. Distinguishable event signatures in this region include track-like and shower-like events. Because the...
NOvA is a long-baseline neutrino oscillation experiment based at Fermilab, Illinois, sampling the NuMI neutrino beam at two functionally-identical detectors. The NOvA Test Beam program consists of a third, scaled-down detector placed in a charged particle beam, and aims to provide an improved understanding of the detector response and energy calibration to enable higher precision measurements...
TAO is a Gadolinium-doped liquid scintillator (GdLS) antineutrino detector located very close (~30 m) to one of Taishan nuclear reactors. TAO will act as a reference detector for the JUNO experiment and will measure the fine structure of the reactor antineutrino spectrum thus providing a benchmark for the nuclear database and reactor monitoring. TAO consists of a 90 cm radius acrylic sphere...
IceCube has measured an astrophysical flux of neutrinos extending to 10 PeV. However, a guaranteed yet undetected flux of cosmogenic neutrinos remains elusive. The cosmogenic neutrino energy density peaks at ~EeV energies. This has led to the development of novel detection technologies optimized for EeV neutrinos; among them, notably, are radio detectors. However, we show here that a similar...
The photon detection system (PDS) is a subsystem of the Deep Underground Neutrino Experiment (DUNE). It is an integral part of the DUNE detector whose primary task is to measure the scintillation light signal and use it to determine the time of occurrence of non-beam events. The photon detection system will also provide a complementary measurement of the deposited energy, and can contribute to...
The KM3NeT Collaboration is currently constructing two next-generation neutrino detectors in the Mediterranean Sea, aiming at: investigating the fundamental properties of neutrinos by measuring
atmospheric neutrino oscillations at GeV energies (ORCA); detecting high-energy cosmic neutrinos from Galactic and extra-Galactic sources (ARCA). The first six detection units of the KM3NeT/ORCA...
PROSPECT, the Precision Reactor Oscillation and SPECTrum experiment, is a short-baseline reactor antineutrino experiment aiming to probe an eV$^2$-scale sterile neutrino oscillation, and to investigate the isotopic origin of discrepancies between measured and predicted reactor antineutrino fluxes and spectra. In PROSPECT, reactor antineutrinos are detected by an optically segmented...
Regarding anomalies in the rate of reactor antineutrinos, NEOS-phase1 tested the existence of sterile neutrino, one of the most prominent candidate, but no strong evidence of the sterile neutrino within the detector sensitivity. The phase2 started to figure out the anomaly in the shape of a reactor antineutrino energy spectrum, called 5-MeV excess, and aims to take about 600-days data...
The Electron Capture in $^{163}$Ho (ECHo) experiment has been designed for the determination of the effective electron neutrino mass exploiting the electron capture spectrum of $^{163}$Ho. The detector technology is based on metallic magnetic calorimeters (MMCs) loaded with $^{163}$Ho and operated at millikelvin temperature. For the coming phase of the experiment, ECHo-100k, the planned...
The T2K experiment studies neutrino oscillations by measuring $\nu_e$ appearance and $\nu_\mu$ disappearance from a $\nu_\mu$ beam. This is done by observing neutrino events at a near detector situated 280 metres from the beam production target, and at a far detector situated 295 km from the beam production target. Super-Kamiokande, a large water Cherenkov detector, acts as the far detector,...
Radon contamination in pure water causes serious background for low energy physics in Super-Kamiokande experiment, especially, search for distortions of the solar neutrino energy spectrum induced by the MSW effect. For lowering energy threshold (currently 3.5 MeV kinetic energy), investigation of radon concentration in water with sensitivity of < 1 mBq/m3 level is important and a radon...
The nEXO collaboration is pursuing various approaches to Ba-tagging as future upgrades to the nEXO detector. Ba-tagging may allow for the unambiguous identification of a candidate 0nbb event as a true bb decay. One approach is comprised of multiple ion-manipulation devices to transport, trap, and identify ions extracted from a high pressure Xe-gas environment. To characterize the performance...
CUPID (CUORE Upgrade with Particle ID) is a proposed tonne-scale $0\nu\beta\beta$ experiment that will use arrays of low-temperature calorimeters to probe the Majorana nature of neutrinos. CUORE has already shown the power and scalability of tonne-scale array at low temperatures (~10 mK), and CUPID aims to improve on its search sensitivity by reducing backgrounds by at least two orders of...
As an underground multi-purpose neutrino detector with 20 kton liquid scintillator, JUNO has great potential to detect the supernova neutrino background (DSNB). Depending on intensive supernova neutrino simulation from the numerical supernova simulations, about 4-8 events per year are expected to be detected. The dominant background is from the neutral-current (NC) interaction of atmospheric...
We present a quantitative comparison of constraints on sterile neutrinos from neutrino oscillation experiments and from Planck data. We find that the cosmological data fully exclude the allowed regions from the LSND, MiniBooNE and Neutrino-4 collaborations, and those from the gallium and rector anomalies, at the 95% CL. Compared to the exclusion region from the Daya Bay $\nu_{e}$-disappearance...
When monitoring reactor antineutrinos for nuclear nonproliferation purposes, a hidden nuclear reactor can be obscured by activities of a known reactor of much greater power nearby. Thus any monitor must discriminate known background reactor fluxes from possible unknown reactor signals. We find the confidence to reject the (null) hypothesis of a single proximal reactor, by exploiting...
Long baseline neutrino oscilllation experiments rely on charged-current quasi-elastic (CCQE) neutrino interactions to reconstruct the characteristic energy dependence of oscillation probabilities. The MINERvA experiment at Fermilab tests models for processes that obscure neutrino energy and interaction channel reconstruction on a variety of nuclear targets. MINERvA's first CCQE measurement...
So little is known about the nature of the dark sector of our universe. An interesting and viable possibility that may explain some cosmological puzzles is that dark matter consists, at least in part, of an ultra-light scalar with mass much below the electronvolt scale (sometimes called Fuzzy Dark Matter). If this field couples to standard model particles, it may induce time dependency of...
Are you tired of having to join multiple collaborations? Do you struggle to keep track of different detectors, readouts, and active materials to do different physics? Do you wish you could do all the most interesting physics in just one experiment? There has to be a better way!
Introducing DUNE-beta. It has argon! It has Xenon! It can fill all your double beta, oscillations, and supernova...
The detection of such pre-supernova (pre-SN) neutrinos could provide an important and independent early warning for the optical observations of core-collapse SNe. In this work, we investigate the capability of future large liquid-scintillator detectors for the early warning via the detection of pre-SN neutrinos in both $\overline{\nu}^{}_e + p \to e^+ + n$ and $\nu (\overline{\nu}) + e^- \to...
Precision measurements of neutrino oscillation parameters with DUNE require estimates of uncertainties in the neutrino flux. These uncertainties fall into two general categories: those associated with hadron production, and others categorized as so-called focusing effects. The focusing of the LBNF $\nu$-beam is affected by various uncertainties in the position and composition of the beamline...
Feldman-Cousins method is a unified approach to create frequentist confidence intervals near physical limits or with low statistics. It has been widely used in oscillation parameter inference for neutrino experiments. However, the Feldman-Cousins method is usually computationally expensive, on the order of tens of millions of CPU hours. In this work, we propose an iterative method using...
JSNS$^{2}$ (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is a short baseline neutrino oscillation experiment searching for $\bar{\nu}_{\mu} \to \bar{\nu}_{e}$ appearance mode caused by sterile neutrinos at the Material and Life Science Experimental Facility (MLF) of J-PARC.
The detector construction and installation to the experimental site recently has been done, and...
Elastic neutrino-electron scattering provides an important tool for normalizing neutrino flux in modern experiments. This process is subject to large radiative corrections. We determine the Fermi effective theory performing matching to the Standard model at the electroweak scale with subsequent running down to low energies. Based on this theory, we analytically evaluate virtual corrections and...
A review on neutrino electromagnetic properties and interactions is given. We consider constraints on neutrino magnetic and electric dipole moments, electric millicharge, charge radii and anapole moments from the terrestrial laboratory experiments and astrophysical observations. The main manifestation of neutrino electromagnetic interactions, such as: 1) the radiative decay in vacuum, in...
The JSNS2 experiment aims to search for the existence of sterile neutrino at J-PARC. A 1 MW beam of 3 GeV protons incident on a spallation neutron target produces an intense neutrino beam from muon decay at rest. The experiment will search for muon anti-neutrino to electron anti-neutrino oscillations which are detected by the inverse beta decay interaction, followed by gammas from neutron...
Calibration and simulation of the SoLid detector energy response are crucial to correct detector inhomogeneities and perform a neutrino oscillation measurement. The detector is composed of 12,800 (5x5x5 cm3) cubes made of PVT scintillator and read out by a network of 3,200 wavelength shifting fibres and MPPCs. Two methods have been developed to extract light yield from Compton edge spectrum in...
The ENUBET experiment is developing a new neutrino beam based on conventional techniques in which the flux and the flavor composition are known with unprecedented precision (O(1%)). Such a goal is accomplished monitoring the associated charged leptons produced in the decay region of the ENUBET facility. Positrons and muons from kaon decays are measured by a segmented calorimeter instrumenting...
The KM3NeT research infrastructure is under construction at two locations in the Mediterranean Sea. The KM3NeT/ORCA water-Cherenkov neutrino detector off the French coast consists of a
three-dimensional array of photosensors. Its main purpose is the determination of the neutrino mass ordering by investigating the flavour oscillations of few-GeV atmospheric neutrinos. In this contribution, we...
We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of all possible lepton-flavour-conserving and lepton-flavour-violating non-standard interactions (NSIs) of the neutrino. We derive simple approximate analytical expressions for the mass-mixing parameters in matter in presence of NSIs. We observe that only the NSIs in 2-3...
One of few methods to determine the neutrino mass scale is to use the neutrinoless double-β decay under the assumption that the neutrino is a Majorana particle. The nuclear matrix element of this decay is one of the indispensable ingredients for this approach, and this quantity can only be obtained by theoretical calculations. Currently, the calculated nuclear matrix elements are distributed...
The EXO-200 experiment was conceived to search for neutrinoless double beta decay of 136Xe. The experiment was located 650 meters underground at the Waste Isolation Pilot Plant and was in operation from May 2011 until November 2018. The muon veto system in the EXO-200 experiment consisted of twenty-nine plas- tic scintillator panels that surrounded four out of six walls of the clean room that...
The Neutrinos from Stored muons (nuSTORM) facility has been proposed to measure $\nu_e ~ N$ and $\nu_\mu ~ N$ cross section very precisely. nuSTORM shows excellent promise to search for the existence of light sterile neutrinos that have been postulated to explain the LSND and MiniBooNE results with Charged Current events in a magnetized Iron calorimeter detector.
In this study we study the...
Neutrinos can propagate very long distances without any deviation as they undergo only through weak interactions. This characteristic property can thus provide an ideal platform to investigate Planck suppressed physics, such as CPT violation, through their long distance propagation. CPT violation can be studied through Lorentz invariance violation (LIV) in the long-baseline neutrino...
Neutrinoless double-beta decay (0νββ) is an experimentally sensitive avenue to probe the Majorana-versus-Dirac nature and mass scales of neutrinos. This work [1] quantitatively explores the interplay between exposure and background levels in 0νββ experiments with respect to their target sensitivities at the design stage. In particular, background reduction will be playing increasingly...
Borexino is a 280-ton liquid scintillator detector located at the Laboratori Nazionali del Gran Sasso, Italy. Its current primary goal is the detection of neutrinos from the CNO cycle in the Sun using both counting and spectral shape analyses. The main challenge is posed by the similar spectral shapes of CNO neutrinos and the $^{210}$Bi background, a beta emitter. A measurement of the...
The first observation of coherent elastic neutrino-nucleus scattering (CEvNS) was made by the COHERENT collaboration at the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS) in August 2017 with a 14.6 kg CsI(Na) detector. One of the physics goals of the COHERENT experiment is to test the N$^2$ dependence of the CEvNS cross section predicted in the Standard Model by observing...
Current and future generation neutrino oscillation experiments aim towards a high-precision measurement of the oscillation parameters and that requires an unprecedented understanding of neutrino-nucleus scattering. Charged-current quasielastic–like (CCQE-like) scattering is the process in which the neutrino produces a charged lepton and a single proton in the final state without any additional...
CROSS (Cryogenic Rare-event Observatory with Surface Sensitivity) project is focused on 0$\nu$2$\beta$ decay searches with surface-sensitive bolometers, aiming to develop a mid-scale demonstrator with Li$_2^{100}$MoO$_4$ bolometers and Al coating, which allows rejecting near-surface events thanks to pulse shape modification, induced by the superconducting film. Several bolometers were...
The Project 8 collaboration aims for a direct measurement of the absolute neutrino mass scale from the distortion of the tritium beta decay spectrum near the endpoint. To this end, the collaboration has successfully established CRES, a frequency-based approach to detect electrons and determine their kinetic energy. In this contribution we present the first tritium spectrum recorded using the...
We investigate a simplified freeze-in dark-matter model in which the dark matter only interacts with the standard-model neutrinos via a light scalar. The extremely small coupling for the freeze-in mechanism is naturally realized in several neutrino-portal scenarios with the secret neutrino interactions. We study possible evolution history of the hidden sector: the dark sector would undergo...
Atmospheric neutrino experiments can show the “oscillation dip” feature in data, due to their sensitivity over a large $L/E$ range. In experiments that can distinguish between neutrinos and antineutrinos, like INO, oscillation dips can be observed in both these channels separately. We present a data-driven approach -- that uses the asymmetry in the up and down events, binned in the...
This work proposes deep underwater neutrino detection with a solid-state detector: KaiKai. Planned as a portable instrument operable in the depths, it is expected to measure geoneutrinos from the mantle up to 83% of the signal. The location of currents and futures detectors in SNEWS indicates the Pacific Ocean as an optimal location for supernova triangulation, with a maximum at $\sim$500km...
The next generation of neutrino oscillation experiments rely on the precise understanding of neutrino interactions in a wide energy range. In particular, the knowledge of the exact mixture of hadrons in showers affects the efficiency to distinguish between NC/CC events, the topological characterization, and impacts the estimation of backgrounds. The GENIE neutrino Monte Carlo developed an...
When the next galactic supernova explodes, we'll need to be ready to get the most of its neutrino signal. HALO-1kT is a 1 kton lead-based supernova detector that will be possibly be built at Laboratori Nazionali del Gran Sasso (LNGS) in Italy. Its sensitivity to Charged-Current electron neutrinos makes it complementary to most of the other supernova detectors, mainly based on water or liquid...
The Radio Neutrino Observatory in Greenland (RNO-G) is designed to make the first observations of ultra-high energy neutrinos at energies above 100 PeV via the detection of Askaryan radiation and serve as a technology pathfinder for IceCube-Gen2. The experiment will be composed of 35 autonomous stations deployed over a 5 x 6 km grid near to NSF's Summit Station in Greenland. The electronics...
We studied a neutrino decay scenario as a potential solution to conciliate the tension between appearance and disappearance data at the short-baseline experiments. Particularly, we considered a heavy neutrino mass-eigenstate that decays into a usual light neutrino plus a massless scalar. Under this neutrino decay hypothesis, we fitted LSND and MiniBooNE electron neutrino appearance data...
Experimental searches for light dark sectors can help shine light on the origin of neutrino masses. In this poster I present one possibility of a dark sector that realizes the inverse seesaw at the MeV scale, and offers new experimental signatures to be searched for. The model, in fact, can accommodate several experimental anomalies, such as the MiniBooNE low energy excess. We are interested...
Cosmic-ray muons produce spallation products which can be serious backgrounds for rare-event detection experiments.
In the Kamioka liquid scintillator anti-neutrino detector (KamLAND), short-lived spallation products e.g. $^{10}$C are one of dominant backgrounds. We show recent methods of rejecting spallation products in KamLAND. New deadtime-free data acquisition system, called MoGURA...
The identification, or “tagging”, of the barium-136 daughter atom that results from double beta decay of xenon-136 provides a promising technique for elimination of all backgrounds except 2-neutrino double beta decay in future xenon-136 neutrinoless double beta decay experiments. We have demonstrated that individual Barium atoms can be imaged and counted in two matrix sites in solid xenon. We...
We examine the impact of Lorentz Invariance Violation (LIV) in measuring the octant of $\theta_{23}$ and CP phases at DUNE. We consider the LIV parameters $a_{e\mu}$ and $a_{e\tau}$, which induce an additional interference term in oscillation probabilities. Taking one LIV parameter at-a-time ($|a_{e\mu}| = |a_{e\tau}| = 5 \times 10^{-24}$ GeV), we find that the octant discovery potential of...
Identifying Cherenkov photons produced when charged particles interact with scintillators provides additional information about the interaction, including directionality and particle identification, while maintaining the excellent energy and position resolution typical of scintillators. Dichroicons achieve this with a Winston cone made from dichroic filters, which reflects photons inconsistent...
We analyze the effect of the Dark-large mixing angle (DLMA)
solution on the effective Majorana mass ($m_{\beta\beta}$) governing neutrino-less double beta decay ($0\nu\beta\beta$) in the presence of a sterile neutrino.
We consider the 3+1 picture, comprising of one additional sterile neutrino.
We have checked that the MSW resonance in the sun can take place in the DLMA parameter space in...
A search for millicharged particles, a simple extension of the standard model, has been performed with the ArgoNeuT detector exposed to the Neutrinos at the Main Injector beam at Fermilab. The ArgoNeuT Liquid Argon Time Projection Chamber detector enables a search for millicharged particles through the detection of visible electron recoils. We search for an event signature with two soft hits...
The STEREO experiment is a very short baseline reactor antineutrino experiment. It is designed to test the hypothesis of light sterile neutrinos being the cause of a deficit of the observed antineutrino interaction rate at short baselines with respect to the predicted rate, known as the Reactor Antineutrino Anomaly. The STEREO experiment measures the antineutrino energy spectrum in six...
KamLAND-Zen is a neutrinoless double-beta(0ν2β) decay search experiment using $^{136}$Xe installed in the KamLAND detector . KamLAND mainly consists of 1 kt liquid scintillator and 1,879 photomultiplier tubes(PMTs).
One of the dominant background sources in the 0ν2β decay energy region around the Q-value of 2.459 MeV is 2ν2β decay due to the finite energy resolution. Since the only way to...
NOvA, a long baseline neutrino oscillation experiment, has made new measurements of the oscillations of neutrinos and anti-neutrinos. Key to these measurements is the use of machine learning algorithms that use topological features to reconstruct neutrino interaction flavor and particle identity. NOvA's latest analysis has made several key improvements to these algorithms which are much faster...
The Askaryan Radio Array (ARA) is a South Pole-based experiment looking to detect radio emission induced by an ultra-high-energy cosmic neutrino interacting in the ice. The newest ARA station is equipped with a novel phased-array trigger designed to lower the trigger threshold by adding signal channels together in beams prior to the trigger. Due to the large number of events, previous ARA...
Neutrino fluxes arising from WIMP annihilation in the center of the sun($\odot$), earth($\oplus$) and galaxy can leave detectable signatures at the proposed 50-kt Iron Calorimeter (ICAL)
detector at the upcoming India-Based Neutrino Observatory (INO). Although the atmospheric neutrinos will pose a
serious background to such signal neutrinos, exploiting the excellent angular resolution of...
SBL neutrino experiments, like LSND and MiniBooNE experiments, indicates towards the existence of eV mass sterile neutrinos. But eV mass sterile neutrinos are in tension with the cosmological observations. To accommodate sterile neutrinos in cosmology self interaction between sterile neutrinos has been studied. We analyzed Planck CMB data with self-interacting sterile neutrino (SIν) and...
The KATRIN (KArlsruhe TRItium Neutrino) experiment aims to measure the effective neutrino mass with an unprecedented design sensitivity of 0.2 eV at the 90% confidence level by measuring the energy of the electron that is produced in tritium beta decay. Magnetic fields guide charged particles through the energy-analyzing retarding spectrometers towards the detector. In this process, ions...
The possible need of nearly 50 tonnes of 136Xe to search for neutrinoless double beta decay motivates an investigation of doing this enrichment using distillation. This requires a value for the vapour pressure isotopic effect (VPIE) of xenon. The main result of this work is a precise measurement of this VPIE using cryogenic distillation. The still is calibrated with argon and krypton. The VPIE...
Due to its long baseline, DUNE provides an excellent avenue to probe Earth’s matter effect and associated degeneracies. We study in detail the performance of DUNE to validate matter oscillation by excluding the vacuum scenario. Whatever be the values of oscillation parameters, we find that DUNE can feel Earth’s matter at more than 2$\sigma$ confidence level. The relative 1$\sigma$ precision in...
The KArlsruhe TRItium Neutrino (KATRIN) experiment is designed to determine the effective mass of the electron-antineutrino with a target sensitivity of 200 meV/c2 (90% C.L.) in a direct and model-independent way. KATRIN uses a strong gaseous windowless Tritium source associated with a large high-resolution spectrometer (MAC-E filter) to analyze precisely the electron energies from the source....
The J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source (JSNS2) experiment will begin collecting data this year. The physics program of JSNS2 consists of a variety of measurements using decay-at-rest neutrinos produced by the interactions of 3 GeV protons with a mercury target at the J-PARC Material and Life Science Experimental Facility (MLF). In particular, the MLF is the...
The neutrino mass ordering (NMO) is one of the fundamental questions in neutrino physics. This can be unraveled by next-generation neutrino detectors such as JUNO and KM3NeT-ORCA. JUNO is a medium-baseline (53 km) reactor experiment which could be sensitive to the NMO by investigating the interference effects between fast oscillations in oscillated electron-antineutrino spectrum. KM3NeT-ORCA...
The CUORE experiment is the largest bolometric array ever built with the main goal of searching for the lepton flavor violating neutrinoless double beta decay of $^{130}\mathrm{Te}$. The closely packed arrangement of the CUORE crystals allows us to look for coincident signals between detectors. The latest results on $^{130}\mathrm{Te}$ $0\nu\beta\beta$ and $2\nu\beta\beta$ decay to the first...
The Double Chooz experiment has obtained its most precise measurement of the neutrino mixing angle $\theta_{13}$, exploiting for the first time its FD and ND configuration. The improvement of this value falls on the increase of statistics as well as the major reduction of reactor and detection systematics thanks to the iso-flux configuration and a novel detection technique, called Total...
The poster presents the first measurement of the individual ${}^{235}$U and ${}^{239}$Pu antineutrino flux and spectra. The antineutrinos were generated by six nuclear reactors with 2.9 GW thermal power each and detected by eight antineutrino detectors deployed in two near and one far underground experimental halls. The ${}^{235}$U and the ${}^{239}$Pu flux and spectra are obtained by fitting...
The NEXT Collaboration has been operating the NEXT-White detector at the Laboratorio Subterráneo de Canfranc (LSC, Spain) since 2016, and specifically with 136Xe-enriched gas since 2019. NEXT-White is a large-scale demonstrator for 136Xe neutrinoless double beta decay searches in a high-pressure xenon gas time projection chamber. The poster will present the latest NEXT-White results...
We point out that the LDMX (Light Dark Matter eXperiment) detector design, conceived to search for sub-GeV dark matter, will also have very advantageous characteristics to pursue electron-nucleus scattering measurements of direct relevance to the neutrino program at DUNE and elsewhere. These characteristics include a 4-GeV electron beam, a precision tracker, electromagnetic and hadronic...
The scattering of leptons on carbon and calcium targets are analyzed using an approach that incorporates the contributions to the nuclear response functions from the quasi-elastic (QE), inelastic process (RES), and two-particle and two-hole meson exchange current (2p-2h MEC). This RDWIA+MEC+RES approach is successfully tested against 12 C(e,e’) and 40 Ca(e,e’) scattering data. A fit of the...
The introduction of right-handed chirality partners for neutrinos allows the calculation of deviations in the effective number of degrees of freedom in the early universe. The presence of these particles can be useful when proposing dark matter candidates. Moreover, the introduction of a new neutral interaction could explain the mechanism of thermalization of these new particles, while...
We develop a radial- and time-dependent calculation of the $\nu_e$-$\nu_s$ mixing inside the supernovae core by taking into account matter enhanced resonances, reconversions, and collisional production of the sterile neutrinos. The dynamical feedback, generated by the sterile neutrino production on the chemical potentials of leptons and baryons as well as the thermodynamic properties of the...
High-energy cosmic neutrinos present a unique opportunity to search for physics beyond Standard Model thanks to their reach to the highest energies and longest baseline. Beyond Standard Model induced interactions of high-energy neutrinos during their propagation yield distinct signatures in their observables in neutrino telescopes. New physics scenarios will induce a time delay in observation...
Anomalies in short-baseline neutrino experiments suggest the existence of an eV-scale sterile neutrino. Recent fits, to the relevant global neutrino data, find preference for a 3+1 model where the heaviest mass state decays. IceCube, a gigaton ice-Cherenkov neutrino detector, is uniquely sensitive to the effect of these sterile neutrinos on the atmospheric muon neutrino flux at TeV energies....
We explore the implementation of a discrete symmetry, A4 modular symmetry, in linear seesaw mechanism by limiting the utilization of flavon fields. Linear seesaw is acknowledged by broadening the standard model (SM) particle content with three right-handed neutrinos and three sterile neutrinos alongside minimal usage of flavon fields. Here, Yukawa couplings are assigned the modular weight...
Liquid Scintillator (LS) detectors have been a workhorse for low energy neutrino physics ever since the discovery of these elusive particles. In the most common implementation of these detectors, the light produced by particle interactions propagates across transparent scintillator volumes to surrounding photo-sensors. This poster introduces a new detector concept called LiquidO that departs...
NOvA is a long-baseline neutrino experiment primarily studying neutrino oscillations in the NuMI beam from Fermi National Laboratory, USA. It consists of two functionally identical, finely granulated detectors which are separated by 809 km and situated 14.6 mrad off the NuMI beam axis. By measuring the transition probabilities P($\nu_\mu \rightarrow \nu_e$) and P($\nu_\mu \rightarrow...
Theia is a proposed large-scale water-based liquid scintillator (WbLS) detector that could potentially be placed at the Sanford Underground Research Facility (SURF). A series of new developments in liquid scintillator have provided Theia a good ability to discriminate between Cherenkov and scintillation signals. Two proposals with different total masses of 25 (Theia25) and 100 (Theia100) kton...
We attempt to resolve long standing experimental anomalies, namely the MiniBooNE low-energy excess, anomalous magnetic moment of the muon and the excess of K-Long decays observed at KOTO, in the context of a UV complete neutrino mass model that couples to a dark sector. With a GeV scale Z' and MeV scale HNLs, we show that the interplay of vector, neutrino and scalar portals can simultaneously...
IceCube has presented evidence for a time-dependent flux of TeV neutrinos from the blazar TXS 0506+056. Additional events may be observable by IceCube at lower energies, although the existing analysis rapidly loses sensitivity below about 1 TeV. The densely instrumented DeepCore sub-array improves the threshold for observation from 1 TeV down to approximately 10 GeV, giving a unique window to...
MADMAX (the MAgnetized Disk And Mirror Axion eXperiment) is a novel approach to search for Axion Dark Matter in the mass range 40-400 $\mu$eV/c$^2$. It utilizes the principle of the dielectric haloscope, a system composed of several parallel dielectric disks, a mirror, and a receiver. This so-called booster system is placed within a magnetic field and a cryogenic environment. We investigate...
The Project 8 collaboration developed the Cyclotron Radiation Emission Spectroscopy (CRES) technique, aiming to directly measure the absolute neutrino mass with the tritium beta-decay electron energy spectrum endpoint method. Given the convenience of its K-conversion line at 17.8 keV near the tritium endpoint at 18.6 keV, we use $^{83m}$Kr as an electron source for magnetic field calibration...
The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to determine the mass of the electron antineutrino with a sensitivity of 0.2 eV/c² (90% C.L.) in a model-independent approach. The integral β-spectrum is measured in an energy region close to 18.6 keV with an electromagnetic spectrometer (MAC-E filter) at the heart of a 70 m long setup.
The energy resolution of the spectrometer is...
Two essential conceptual structures - geometric representation of Clifford algebra wavefunctions and quantized impedances of wavefunction interactions - are absent from theorists' toolkits. Their synthesis offers complementary Standard Model perspectives, focusing not on Lagrangian flow of energy and information between kinetic and potential, but rather what governs amplitude and phase of that...
The neutrino oscillation probabilities at the long baseline accelerator neutrino experiments are
expected to be modified by matter effects. We search for evidence of such modification in the data
of T2K and NOνA, by fitting the data to the hypothesis of (a) matter modified oscillations and (b)
vacuum oscillations. We find that vacuum oscillations provide as good a fit to the data as...
Atmospheric neutrinos travel very long distances
through earth matter. It is expected that the matter effects
lead to significant changes in the neutrino survival and oscil-
lation probabilities. Initial analysis of atmospheric neutrino
data by the Super-Kamiokande collaboration is done using
the vacuum oscillation hypothesis, which provided a good fit
to the data. Existence of matter...
The Karlsruhe Tritium Neutrino experiment (KATRIN) is targeted to measure $m(\nu_e)$ with a sensitivity of 200 meV (90% C.L.).
To determine the neutrino mass, the integrated $\beta$-spectrum of tritium is measured close to the endpoint and a fit to the data, comprising the neutrino mass as a free parameter, is performed. A number of systematic effects need to be taken into account in the...
The purpose of the JSNS$^{2}$ experiment is to search for sterile neutrinos with Δm$^{2}$ near 1eV$^{2}$. A 3 GeV J-PARC proton beam incident on a mercury target produces an intense neutrino beam from muon decay at rest. which oscillate to anti-electron neutrinos. The JSNS$^{2}$ detector is located at 24 m baseline from the target. The detector has a fiducial volume of 17 tons filled...
Cosmic-muon induced neutrons are an important source of background in
low-background experiments searching for rare phenomena, like
neutrinoless double beta decay or dark matter. These neutrons can
generate radioactive isotopes in the shielding materials or in the
detector itself, creating background which can not be easily removed
by a cosmic-muon veto due to the time delay. The...
The MicroBooNE experiment is an 85 ton active volume liquid-argon time projection chamber
located at the Fermilab Booster Neutrino Beamline. MicroBooNE’s ability to detect low-energy
protons allows us to study single-proton events with a four-momentum transfer squared $Q^2$ as
low as 0.10 $GeV^2$. We present an analysis with a signal of one proton and no other particles (NC1p)
in the final...
MicroBooNE is a Liquid Argon Time Projection Chamber (LArTPC) detector designed to address the excess of low energy electromagnetic events observed by the MiniBooNE experiment. Electron neutrinos can create a wide variety of topologies when interacting in liquid argon, and this analysis measures events both with (1eNp0π) and without (1e0p0π) visible protons. This poster presents the...
The KM3NeT Collaboration is currently building the next-generation large volume Cherenkov neutrino observatories in the Mediterranean Sea. The KM3NeT/ARCA detector aims at studying TeV-PeV astrophysical neutrino sources. KM3NeT/ORCA will study atmospheric neutrino oscillations at few GeV energies to determine the neutrino mass ordering. The first KM3NeT detection units were deployed between...
ProtoDUNE Dual-Phase (DP) is a 300-ton active volume dual-phase liquid-argon TPC, the largest of its kind, being operated at the CERN Neutrino Platform. Since the scintillation light in liquid-argon (LAr) is in the vacuum ultraviolet region, where most photosensors are not sensitive, usually LAr experiments introduce a wavelength shifter. The photon detection system of ProtoDUNE-DP consists of...
The afterpulse is one of the main characterizations of the photomultiplier tubes (PMTs) which can introduce undesired background noise signals, thus its detailed rate, time and charge distributions are important. We have measured two types of 20-inch PMTs to be used in the JUNO central detector, R12860-50 by Hamamatsu and MCP PMTs by North Night Vision technology. The PMT response waveforms...
Coherent elastic neutrino-nucleus scattering (CEvNS) is a standard model process that has been predicted for over 40 years; however, despite the large cross section of this interaction, CEvNS has been measured for the first time only very recently by the COHERENT collaboration. Since first measuring CEvNS in a CsI detector in 2017, the COHERENT collaboration has been working to implement...
Neutrino cross-sections are a key ingredient to a variety of present and future analyses and experiments. Measuring those cross-sections is an active and on-going source of investigation, largely restricted to accelerator studies below a few 100 GeV. However, with the increasing precision of atmospheric neutrino flux measurements and modelling, an opportunity exists to provide enhancements...
Major science goals of the upcoming Jiangmen Underground Neutrino Observatory (JUNO) in China are the search for the proton decay and the detection of the diffuse supernova neutrino background. Both phenomena will show characteristic signals in the detector. Therefore, we evaluate the pulse shape discrimination performance of the future JUNO liquid scintillator (LS) using excitation by gamma...
Recent neutrino oscillation experiments have ushered in a new era with precision measurements employed in the search for CP violation and mass hierarchy. The Deep Underground Neutrino Experiment (DUNE) is a next generation long-baseline neutrino experiment in USA. The single-phase liquid argon far-detector prototype at CERN (ProtoDUNE-SP) is a critical milestone for the DUNE experiment....
MicroBooNE is a near surface Liquid Argon Time Projection Chamber neutrino experiment along the Booster Neutrino Beam at Fermilab. Low electronics noise levels and millimeter spatial resolution allow this detector to be sensitive to MeV-scale interactions. Near surface location of the detector makes it challenging to distinguish low energy nuclear de-excitation photons and neutron scatters...
We study charged lepton flavor violation for the three most popular minimal three-loop Majorana neutrino mass models. We call these models “minimal” since their particle content correspond to the minimal particle contents for which genuine three-loop models can be constructed. In all the three minimal models the neutrino mass matrix is proportional to some powers of standard model lepton...
Charge-Parity-Time (CPT) symmetry governs that the oscillation parameters for neutrinos and anti-neutrinos are to be identical. Different mass and mixing parameters for these particles may give us a possible hint for CPT violation in the neutrino sector. Using this approach, we discuss the ability of long-baseline and atmospheric neutrino experiments to determine the difference between mass...
The GERDA experiment is searching for neutrinoless double-beta ($0\nu\beta\beta$) decay of the germanium isotope $^{76}$Ge. Isotopically enriched germanium diode detectors are operated submersed and in direct contact with liquid argon (LAr). Passive and active background suppression techniques such as shielding, pulse shape discrimination and vetoing are adopted to lower the rate of events...
In high purity germanium detectors, the signal evolution carries informations on the topology of the energy deposition. This feature is exploited in the search for neutrinoless double-beta decay of $^{76}$Ge to discriminate between single- (typical of sought-after signal) and multiple-energy depositions (typical of background events), in the GERDA, MJD and LEGEND experiments. In the effort to...
With 20-kiloton liquid scintillator as detection medium, the Jiangmen Underground Neutrino Observatory (JUNO) will have highly competitive sensitivity to MeV-scale neutrino, and will play an important role in the emerging field of multi-messenger astronomy, especially for the transient events where high radioactivity background can be easily bypassed. We will present a multi-messenger trigger...
The accelerator neutrino experiments LSND and MiniBooNE both detected an excess of electron-like events at a short-baseline, anomalous with the standard three-neutrino oscillation picture. These results indicate the possibility of new eV-scale sterile neutrinos, but also may be an artifact of the poorly understood interactions between neutrinos and heavy nuclei. The Short-Baseline Neutrino...
A precise prediction of the neutrino flux is a key input for accelerator-based neutrino experiments. Neutrino beams are created from the decays of secondary hadrons produced in hadron-nucleus interactions. Hadron production is the leading systematic uncertainty source on the neutrino flux prediction; therefore, its precise measurement is essential.
The neutrino program of the NA61/SHINE...
Quasi-elastic scattering is generally used to measure oscillation due to being the channel where final state interactions and energy reconstruction are best understood. However, the most important background comes from the pion resonances, in which the pion might not be observed due to final state interactions. This is particularly true for CC neutral pion production from the Delta resonance....
In addition to providing constraints for measurements of neutrino oscillations, the T2K off-axis near detector ND280 also measures a variety of neutrino interaction rates, in various exclusive channels.
I will present the status of an updated measurement of the muon neutrino charged current cross section with one positively charged pion in the final state ($\nu_\mu CC1\pi^+$) in ND280. The...
NEON aims an observation of a coherent elastic neutrino-nucleus scattering (CEvNS) using reactor anti-electron neutrino with NaI(Tl) crystal detectors at Hanbit nuclear power plant in Yeonggwang, South Korea. Even though CEvNS was observed by COHERENT collaboration in 2017 with the spallation neutron source, the same process with the reactor neutrino has not yet been observed. The NEON pilot...
Flavor conversions of neutrinos have the potential to dramatically change the inner workings of compact astrophysical objects as well as the synthesis of heavy elements. Notably, fast pairwise neutrino conversions are thought to be triggered in the core of compact objects, as a consequence of the very high neutrino densities and the shape of the angular distributions of neutrinos and...
We have considered a model, where masses and a mixing pattern for neutrinos are governed by six Higgs triplets and $A_4$ symmetry. In this model we have applied a certain diagonalization procedure through which we have shown that neutrino masses can have both normal or inverted hierarchy. We have also shown that current neutrino oscillation data can be explained in this model. The arXiv number...
We explore the complementarity between LHC searches and neutrino experiments in probing neutrino non-standard interactions. Our study spans the theoretical frameworks of effective field theory, simplified model, and an illustrative UV completion, highlighting the synergies and distinctive features in all cases. We show that besides constraining the allowed NSI parameter space, the LHC data can...
High-pressure time projection chambers have superb rare-event detection capabilities. However, putting a high-pressure vessel of any size in a conventional underground lab is prohibitively difficult. Gigantic, inexpensive salt caverns are routinely used as high-pressure storage vessels by the natural gas industry. Here, we describe the conceptual designs of several detectors which can...
We discuss the analytical expression of the oscillation probabilities at low energy long baseline experiments,such as T2HK and T2HKK in the presence of nonstandard interactions (NSIs). We show that these experiments are advantageous to explore the NSI parameters($\epsilon_D$, $\epsilon_N$), which were suggested to be nonvanishing to account for the discrepancy between the solar neutrino and...
We develop an approach to neutrino oscillations in a magnetic field and extend it to the case of three neutrino generations. The theoretical framework suitable for computation of the Dirac neutrino spin, flavour and spin-flavour oscillations probabilities in a magnetic field is given. The closed analytic expressions for the probabilities of oscillations are obtained accounting for the normal...
The effect of neutrino quantum decoherence has attracted a growing interest during the last 15 years. Most existing studies deal with searches of the neutrino quantum decoherence in terrestrial reactor and solar neutrino experiments. New large volume neutrino detectors will provide a new frontier in high-statistics measurements of neutrino fluxes from supernovae. It is thus important for...
IceCube analyses which look for an astrophysical neutrino signal in the southern sky face a large background of atmospheric muons and neutrinos created by cosmic ray air showers. By selecting events which appear to start in the detector, atmospheric muons and neutrinos with accompanying muons are rejected in the southern sky, producing a sample with high astrophysical neutrino purity at lower...
If a neutrino detector can be operated in space it would facilitate at least three future missions for new science. Close to the Sun the neutrino flux can increase more than 10,000 times that on Earth and by going away from the Sun the solar neutrino backgrounds for Dark Matter searches reduced. The Sun could be used as a gravitational focus of neutrino sources detectable with either a...
NOvA is a long-baseline accelerator-based neutrino oscillation experiment that uses the NuMI beam from Fermilab to measure electron-neutrino appearance and muon-neutrino disappearance using a Near Detector, located at Fermilab, and a Far Detector, located in Ash River, Minnesota. The high flux of muon neutrinos at the Near Detector allows for measurement of rare processes such as neutrino...
We discuss the connection between the origin of neutrino masses and the properties of dark matter candidates in the context of gauge extensions of the Standard Model. We investigate minimal gauge theories for neutrino masses where the neutrinos are predicted to be Dirac or Majorana fermions. We find that the upper bound on the effective number of relativistic species provides the strongest...
The COHERENT collaboration seeks to measure neutrino interaction cross sections using the high-intensity, pulsed neutrino flux provided by the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). In addition to ongoing CEvNS measurements, the collaboration deploys a set of detectors dedicated to the observation of neutrons produced via neutrino interactions in iron and...
This poster summarizes which nuclear particles emit, absorb, and scatter with neutrinos in central engines of core collapse supernovae. Our numerical simulations show that neutrino interactions with nucleons and nuclei have great impacts on the results of supernova simulations. Before the core-bounce, neutron-rich heavy nuclei like Zn$^{80}$ are dominant at the center of collapsing cores and...
The eHWC J1825-134 gamma-ray source is located in the southern sky and has been recently detected by the HAWC observatory. Amongst the HAWC sources, it is the most luminous in the multi-TeV domain. We show the prospects to detect this source at the forthcoming KM3NeT detector and comment on the possibilities of detection with other neutrino telescopes.
The production and prompt decays of $D_s$ and $B$ mesons to tau neutrinos and taus can produce a significant number of tau neutrinos in the high rapidity region at the LHC. Heavy flavor decays dominate tau neutrino production in the far-forward region. Using NLO QCD and heavy quark transverse momentum smearing guided by LHCb data on $D_s$ production for rapidity $y=2.0-4.5$, we present a new...
This year, the LEGEND (Large Enriched Germanium Experiment for Neutrinoless Double-beta decay) Collaboration has begun the construction of its initial phase, LEGEND-200, using the existing GERDA infrastructure, with a final 1000-kg installation (LEGEND-1000) planned. Using a custom simulation module based on Geant4, we are examining the neutron-induced background from multiple origins, such as...
The long-baseline neutrino oscillation experiments rely on models of neutrino interactions on nuclei. These models constitute an important source of systematic uncertainty, driven in part because detectors to date have been blind to the neutrons produced in neutrino interactions. We are proposing a 3D-projection scintillator tracker as a near detector component in the next generation...
The System for on-Axis Neutrino Detection (SAND) is a reference detector in the Near Detector complex of the Deep Underground Neutrino Experiment (DUNE). It is composed of a 3-Dimensional Projection Scintillator Tracker (3DST), surrounded by a low-density tracker, an ECAL and a Magnet used for the KLOE experiment. This system aims at detecting all final-state particles including neutrons from...
A new effect has been taken into account which has ever been
used before in physics, this effect related to two different fi?elds, Quantum physics, and General Relativity. This effect takes name: Time Dilatation as an Effect of Approaching Planck Length, this effect is completely different from the gravitational time dilatation in general relativity and time dilatation due to closing to the...
DUNE is one of the most promising future neutrino oscillation
experiments and it is expected to be very sensitive to new physics in neutrino oscillations.
In our analysis we showed that the $\nu_\mu \to \nu_\tau$ appearance channel with the subsequent decay $\tau \to e$ can improve significantly the DUNE sensitivity to the propagation Non Standard Interactions (NSI) parameter...
The CUPID-Mo experiment, currently taking data at the Laboratoire Souterrain de Modane (France), is a demonstrator for a next-generation upgrade of the first ton-scale cryogenic $0\nu\beta\beta$-search, CUORE. The experiment is probing $0\nu\beta\beta$ of $^{100}$Mo with an array of 20 enriched 0.2 kg Li$_2$MoO$_4$ crystals and Ge light detectors allowing to distinguish $\alpha$ from...
Discovering neutrino decay would be strong evidence of new physics. Presently, there are only lax lower limits on the lifetime $\tau$ of neutrinos, of $\tau/m > 10^{-3}$ s eV$^{-1}$ or worse, where $m$ is the neutrino mass. Fortunately, TeV-PeV cosmic neutrinos offer superior sensitivity to decay due to their cosmological-scale baselines. We employ a promising method, recently proposed, that...
Non-standard neutrino interactions (NSI) may occur at production, propagation and detection of solar neutrinos affecting their survival probability and interaction cross sections. In this analysis, we consider flavor-diagonal neutral current NSI and study their impact on the solar neutrino spectral shapes and the interaction rates using the Borexino Phase-II data. Results on the NSI coupling...
The MAJORANA DEMONSTRATOR (MJD) is a low-background experiment searching for $\beta\beta$-decay of $^{76}$Ge to ground and excited states (ES) in $^{76}$Se using a modular array of high purity germanium detectors. The experiment consists of two modules with 29 detectors each, consisting of 44.8 kg of germanium detectors (29.7 kg enriched to 88% in $^{76}$Ge). ES decays produce a $\beta\beta$...
We analyze the lepton flavor violating (LFV), Higgs LFV and Z boson LFV decays in the context of a seesaw model with an arbitrary number of scalar doublets. The lepton sector is enlarged by adding to each lepton family a right-handed neutrino singlet. We compute analytically the full one-loop decay amplitudes for the processes l_i --> l_j gamma, Z --> l_i l_j, and h --> l_i l_j where i not...
Non-standard neutrino interactions (NSI) generically emerge in various types of new physics. By modifying the matter potential encountered by atmospheric neutrinos, NSI can lead to deviations from the expected dominant two-neutrino vacuum oscillations $\nu_\mu\rightarrow\nu_\tau$. Their signature can be probed by high-statistics neutrino experiments such as IceCube. We present NSI constraints...
One of the primary challenges in current and future precision neutrino experiments using liquid argon time projection chambers (LArTPCs) is understanding detector effects and quantifying the associated systematic uncertainties. MicroBooNE consists of a LArTPC located on-axis in the Booster Neutrino Beam (BNB) at Fermilab, and has pioneered the evaluation of detector systematic uncertainties...
Non-standard interactions (NSI) of neutrinos in matter have long been proposed as a way to quantify new physics in the neutrino sector beyond mass generation. Including these effects in the oscillation framework can lead to large differences in the interpretation of experimental data with respect to Standard Model (SM) weak interactions alone, causing degeneracies in measurements of the solar...
The detection of coherent neutrino-nucleus scattering (CEvNS) opens a new window to study the fundamental properties of neutrinos and to probe physics beyond the Standard Model of Particle Physics.
NUCLEUS is a novel cryogenic neutrino experiment which allows for precision measurements of CEvNS at unprecedentedly low energies. It is based on recently demonstrated cryogenic detectors with...
One of the main goals of the ANTARES neutrino telescope is the search for point-like neutrino sources. Hence, a reliable method to estimate both the angular resolution and the pointing accuracy of the detector is needed. In this poster we present the study of the Sun "shadow" effect: the shadow is the deficit in the atmospheric muon flux in the direction of the Sun induced by the absorption of...
The origin of neutrino masses heralds new physics. In some theories beyond the standard model, existence of sterile neutrinos have been predicted. In this paper, we ask the question: what if sterile neutrinos cause the space-time geometry to be warped in a way that it leads to repulsive gravity? We use a Lambda-CDM model along with a negative gravitational constant for the sterile neutrinos to...
Lepton-antilepton pairs production through neutrino-nucleus scattering, "tridents," are a sensitive probe in the search for new neutral currents. The di-muon channel, $\nu_{\mu} N \to \nu_{\mu} \mu^+\mu^- N$, has been observed in previous experiments: CCFR, NuTeV, and CHARM-II. Simulations predict that the DUNE near detector (ND) will have high statistics in trident channels, presenting a...
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to determine the effective neutrino mass with a sensitivity of $m_\nu=0.2$ eV/c$^2$ (90% C.L.) using electrons from the tritium beta-decay.
The beta-electrons decaying in the windowless gaseous tritium source (WGTS) are guided adiabatically to the spectrometers, where their energy is analyzed with a present filter width of 2.8 eV.
In...
OSIRIS is a 20 ton liquid scintillator (LS) detector. Its purpose is to serve as a pre-detector for the 20 kiloton JUNO detector under construction in Jiangmen, China. It will monitor JUNO's LS for about six months during filling. The measurement exploits the fast BiPo time-coincidences of the $^{238}$U and $^{232}$Th decay chains. OSIRIS will also measure the rates of $^{14}$C and $^{210}$Po...
We present the proton and neutron vector form factors in a convenient parametric form that is model independent and optimized for momentum transfers $\leq$ few GeV$^2$. The form factors are determined from a global fit to electron scattering data and precise charge radii measurements. We apply a new treatment of radiative corrections. We evaluate the neutrino–nucleon scattering cross sections...
In this poster, we present a fast and scalable deep learning algorithm for particle clustering in liquid argon time projection chamber (LArTPC) data, as part of the machine learning based reconstruction effort at SLAC. Particle clustering refers to the task of grouping image pixels into particle instances, which is regarded as one of the most challenging tasks in LArTPC data reconstruction....
The Jiangmen Underground Neutrino Observatory (JUNO) is a low
background 20 kton liquid scintillator multi-purpose experiment located in Kaiping,
Jiangmen, China. Its physics goals include the
determination of the neutrino mass ordering as well as the oscillation parameters using
reactor neutrinos. JUNO will be instrumented with approximately 20,000 20-inch
photomultiplier tubes (PMTs) of...
The LiquidO detection technique falls on the light confinement near its creation point by using an opaque liquid scintillator and on the light collection by a dense array of fibres. This technique enables highly efficient particle identification with the consequent event-by-event topological discrimination power, including positron, electron and gamma events. With the potential background...
MINERvA is a neutrino-nucleus cross-section experiment with a segmented detector that provides a resolution fine enough to support new techniques that probe the nuclear environments. Previous charged pion analyses on MINERvA have required a pion track in the event selection. However, recent developments show promise of identifying low energy pions (20 MeV - 100 MeV) in an extended phase space...
The JSNS2 experiment will search for neutrino oscillations with ∆m2 ' 1 eV2 from ¯νµ to ¯νe, detected via the IBD reaction and tagged via gammas from neutron capture on Gadolinium. A 3 GeV 1 MW proton beam incident on a mercury target at the MLF at J-PARC produces an intense neutrino flux from mu-DAR. The JSNS2 experiment consists of a 50 tons liquid scintillator detector, that is already...
This poster presents a novel covariance matrix method for performing multi-detector fits, which combines a Gaussian multivariate treatment of systematic uncertainties with a Poisson likelihood treatment of statistical uncertainties. In this method, systematic uncertainties encoded into a covariance matrix are utilised to solve for the optimal systematic pulls in each analysis bin, and these...
Recent analyses of the diffuse TeV-PeV neutrino flux highlight a tension between different IceCube data samples that suggests a two-component scenario rather than a single steep power-law. Such a tension is further strengthened once the latest ANTARES data are also taken into account. Remarkably, both experiments show an excess in the same energy range (40-200 TeV), whose origin could...
We will present the most precise measurement of the two-neutrino double-beta decay of $^{100}$Mo using lithium molybdate scintillating low-temperature calorimeters. We used four highly radiopure and $^{100}$Mo-enriched crystals for the measurement. We developed the detectors under the purview of the CUPID-Mo experiment and operated them in the EDELWEISS-III low-background facility in the...
The artificial source of antineutrinos 144Ce-144Pr is one of the most promising for the sterile neutrino search experiments. We have produced a semiconductor $\beta$-spectrometer with a sensitive region thickness exceeding 9.6 mm that fully absorbs electrons with energy below 3 MeV. It was used for a precise measurement of the $\beta$-spectra of 144Ce-144Pr ground and excited state...
I will propose a model for both quraks and leptons based on the $SU(5)$ grand unification and $\mathcal{T}_{13}$, a discrete subgroup of $SU(3)$, family symmetry. It naturally reproduces GUT-scale mass ratios of quarks and charged leptons and their mixing angles, assuming tribimaximal (TBM) seesaw mixing. It predicts normal ordering for light neutrino masses with $m_{\nu_1} = 27.6$, $m_{\nu_2}...
The next Galactic supernova will be a historic opportunity for multi-messenger astronomy. A core collapse will produce a neutrino burst visible up to half a day before electromagnetic radiation from the explosion, providing an early warning for optical follow-up and valuable insight about the proto-neutron star. Since local supernovae are exceedingly rare, it is critical that neutrino...
The majority of the background in the neutrino mass experiment KATRIN possibly originates from the ionization of Rydberg atoms within the main spectrometer volume. In Rydberg atoms one or more electrons have a high principal quantum number n resulting in a large orbital radius with long decay periods in the millisecond range. Once produced in radioactive processes in the inner surface of...
The Deep Underground Neutrino Experiment (DUNE) is an international project for neutrino physics searches, currently in its planning stages. DUNE will consist of two detectors exposed to the world’s most intense neutrino beam. The Near Detector will sample the beam near the production target, at Fermilab. The Far Detector, comprising four 10-kton LArTPC modules, will be installed 1300 km away,...
The KM3NeT-ORCA and its predecessor ANTARES are neutrino telescopes operating in the Mediterranean sea. While KM3NeT-ORCA is under construction, ANTARES has accumulated more than 10 years of data. ANTARES has successfully demonstrated detector technologies and analysis techniques for undersea neutrino detection ranging from energies of 20 GeV to tens of TeV. ORCA is specifically designed for...
The exchange of two neutrinos at one loop leads to a long-range parity-violating force between
fermions. We explore the two-neutrino force in the backdrop of atomic physics. We point out that
this is the largest parity-violating long-range force in the Standard Model and calculate the effect of
this force in experiments that probe atomic parity violation by measuring optical rotation of...
We discuss the main problems and theoretical difficulties in the Standard Model, that impact fundamental physics, the search for new physics and challenge future experimental progress in precision exotic physics, observational cosmology and particle physics. Despite its great predictive power and major successes, the model fails answering several questions and incorporate gravity in a...
DUNE is an upcoming long-baseline neutrino-oscillation experiment, with one primary goal being the discovery of leptonic violation of the charge–parity symmetry. The far detector will be composed of four liquid-argon time-projection chambers, including two that will operate in a single argon phase. Anode plane assemblies are critical components in these single-phase detectors as they are...
The first phase of the Precision Reactor Oscillation and Spectrum (PROSPECT) experiment provided high-impact limits on sterile neutrino oscillations at the eV2 scale and a high-resolution measurement of the antineutrino spectrum due purely to 235U fission daughters. These goals remain well motivated by persistent discrepancies between measurement and prediction of both reactor flux and...
PROSPECT, the Precision Reactor Oscillation and SPECTrum experiment, is a reactor antineutrino experiment consisting of a segmented liquid scintillator antineutrino detector designed to probe short-baseline neutrino oscillations and precisely measure the antineutrino spectrum of the primary fission isotope U-235. PROSPECT’s neutrino oscillation analysis utilizes target segmentation to look for...
Identifying the flavor of astrophysical neutrinos will be a challenge for both current and proposed next-generation neutrino experiments that will have improved sensitivity to the diffuse astrophysical flux of ultra-high energy neutrinos. In order to probe predicted mixing ratios of neutrino flavors, an experiment capable of unambiguously measuring a single flavor of the neutrino flux is...
We detail the sensitivity of the dark matter experiment DARWIN to solar neutrinos via elastic electron scattering. DARWIN will potentially measure five solar neutrino components: $pp$, $^7$Be, $^{13}$N, $^{15}$O and $pep$. The precision of the $^{13}$N, $^{15}$O and $pep$ components are hindered by the double-beta decay of $^{136}$Xe and thus would benefit from a depleted target. A...
Future neutrino detectors, whether answering questions of fundamental physics or exercising nuclear monitoring techniques, will require advanced technologies for optimal performance. One such candidate technology is water-based liquid scintillator (WbLS), a material for which Cherenkov and scintillation light may be discriminated and examined independently. We present a measurement of the...
The search for neutrinoless double beta decay could cast light on one critical piece missing in our knowledge i.e. the nature of the neutrino mass. Its observation is indeed the most sensitive experimental way to prove that neutrino is a Majorana particle. The observation of such a potentially rare process demands a detector with an excellent energy resolution, an extremely low radioactivity...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment designed to determine neutrino mass hierarchy, measure oscillation parameters and investigate solar neutrinos, supernova neutrinos and geoneutrinos, etc. The JUNO central detector (CD) contains 20 ktons of liquid scintillator with an acrylic sphere (35.4m inner diameter). Our baseline requirement of...
For the future Hyper-Kamiokande (HK) experiment, radon will be one of the most dangerous background for low energy neutrino analysis like solar neutrinos. Using Super-Kamiokande (SK) solar data, we developed a model of the radon distribution in the Super-Kamiokande detector. After scaling this model to the size of the future Hyper-Kamiokande detector, we can estimate the probable radon...
The discovery of an astrophysical flux of neutrinos with IceCube is a milestone for multimessenger astronomy. Neutrinos open a new window on the high-energy Universe. They provide a complementary view on cosmic accelerators and can help solve the long-standing puzzle of the Ultra-high Energy Cosmic Rays origin.
Thanks to IceCube's capabilities to observe the sky with almost full duty cycle,...
Reactor anti-neutrinos are most likely to be detected via inverse beta decay (IBD) reaction in hydrogen-rich detectors. However, they have never been detected in pure water Cherenkov detectors due to the low detection efficiency and poor reconstruction of the neutron events, and the first detection would be quite interesting. A reactor anti-neutrino search using the SNO+ detector during the...
Recent reactor neutrino experiments have shown anomalous results in both the reactor flux and spectrum measurements.
Compared the measurements, Reactor neutrino flux shows a 6% deficit while reactor netrino spectrum illustrates a
bump-like structure at around 5 MeV region. In this presentation we will employ the methods of both theoretical model prediction
and global neutrino data...
Electron anti-neutrinos from the beta decay of nuclear fission fragments in reactor cores are the only product from nuclear reactors which cannot be shielded. This makes them of interest in nuclear non-proliferation, as well as in oscillation experiments. Reactor neutrinos typically have an energy of a few MeV, making detection difficult in water Cherenkov detectors like Super-Kamiokande....
KM3NeT is a multi-purpose cubic-kilometer neutrino observatory being deployed at the Mediterranean Sea. It consists of two detectors: ARCA and ORCA. ARCA will instrument 1 Gton of seawater, primarily aimed at detecting cosmic neutrinos between several tens of GeV and PeV. ORCA is smaller (~ few Mtons) and denser, optimized for detecting atmospheric neutrinos between 1 to 100 GeV. Located in...
Deep neural networks (DNN) enabled countless breakthroughs in the fields of artificial intelligence and computer vision and they have been successfully applied to the data reconstruction of Liquid Argon Time Projection Chambers (LArTPC), which offer high resolution (~3mm/pixel) 2D or 3D imaging of charged particles' trajectories. The ICARUS detector is a large-scale (760-ton) LArTPC far...
While oscillations of solar neutrinos are usually studied using single-particle quantum-mechanical approach, flavor conversion of supernovae neutrinos is typically analyzed using kinetic equation for the matrix of densities due to necessity to include also scattering processes. The kinetic equation is believed to be in conflict with the uncertainty principle and unable to account for the...
Neutrinos play a key role in supernova explosions. When a massive star explodes, most of the gravitational binding energy released by the collapse of the core is carried away by neutrinos. In order to understand the mechanism of the supernova explosion and subsequent evolution of massive stars, we are going to discuss the neutrino transport appropriately to find the angular moment equations,...
The Double Chooz (DC) experiment is a reactor antineutrino experiment designed to measure the θ13 mixing angle. The experiment is located at Chooz-B nuclear power plant and consists of two IBD detectors respectively located ~400m and ~1050m to the two 4.25 GW pressurized water reactors constituting the plant. In 2018, DC reported its latest analysis of θ13 with both detectors taking data...
The China Jinping Underground Laboratory (CJPL) with the lowest cosmic-ray muon
flux and the lowest reactor neutrino flux of any laboratory is ideal to carry out low energy neutrino experiments for solar neutrino, geo-neutrino and supernova neutrino
physics studies. At present, a 1-ton prototype for Jinping Neutrino Experiment of
which the target material is liquid scintillator is deployed...
We present a complete characterization of a small (9-liter) and mobile 6Li-doped pulse-shape-sensitive plastic scintillator antineutrino detector called SANDD (Segmented AntiNeutrino Directional Detector), constructed for the purpose of near-field reactor monitoring with sensitivity to antineutrino direction. A detailed Monte Carlo simulation code was developed and validated to model the...
Pulse-shape-discriminating plastic scintillator doped with Li-6, may lead the way to a next generation of reactor-antineutrino detectors --- with particle ID and position sensitivity enhanced by segmentation. This poster highlights the development of these features as the first step towards a Segmented AntiNeutrino Directional Detector (called SANDD). We constructed and tested a module of the...
The SBC collaboration is developing liquid argon filled scintillating bubble chambers with projected sensitivity to coherent elastic neutrino nucleus scattering (CE$\nu$NS) from reactor neutrinos. Nuclear recoil induced bubbles are detected by cameras and piezoelectric acoustic sensors; scintillation photons from recoil events and backgrounds, shifted to 175 nm by xenon doping, are...
KamLAND-Zen experiment is a neutrino-less double-beta decay search experiment with $^{136}$Xe and the low background liquid scintillator (LS) detector.
In order to suppress backgrounds proportional to volume, $^{136}$Xe loaded LS is stored in an inner balloon (IB) made of nylon.
The IB was made as clean as possible. However, the contamination of $^{238}$U still remains, and its daughter...
The observation of coherent elastic neutrino nucleus scattering (CEvNS) by the COHERENT collaboration in 2017 has opened a new window to beyond the Standard Model physics and is used to test the Standard Model predictions at a different energy scale. However a careful statistical analysis is essential to derive correct constraints and bounds on new physics parameters. We perform a detailed...
DeepCore is a part of IceCube that enhances IceCube's sensitivity in the low energy range enabling the search for astrophysical transient sources, e.g., choked gamma-ray bursts (GRBs). We present sensitivities to transient timescales between 100 seconds and 1 week in an energy range from 10 to 200 GeV. A dataset that is obtained from a newly developed low energy event selection is used in our...
The LEGEND experiment is a phased approach for searches for neutrinoless double beta ($0\nu\beta\beta$) decay using $^{76}$Ge-enriched germanium detectors immersed in liquid argon. While the first stage LEGEND-200 plans to start data taking by 2021, the subsequent ton-scale effort is in its initial design phase. As shown by current experiments, the unique properties of germanium detectors -...
Dark matter particles in the galactic halo can scatter off particles in celestial bodies such as stars or planets, lose energy and become gravitationally trapped. In this process, an accumulation of dark matter in the center of celestial bodies is expected, for example, at the center of the Earth. If dark matter self-annihilates into Standard Model particles, the end products of these...
We have searched for exotic neutrino-electron interactions that could be produced by a neutrino millicharge, magnetic moment or dark photons using solar neutrinos in the XMASS-I. No significant signals have been observed and upper limit of these constant values are estimated as preliminary. For the neutrino millicharge search, $5.4\times10^{-11}$e for all flavors of neutrino is obtained. We...
Dark matter searches have found until now no evidence for a WIMP candidate at the GeV-TeV scale.
Heavy sectors of physics beyond the Standard Model provide dark matter candidates at and above 10-100 TeV. Such heavy dark matter can be indirectly searched for in secluded scenarios,
which naturally evade the unitarity bound on the dark matter mass, and at the same time allow to reliably...
A.V. Derbin for the Borexino collaboration
The results of a low-energy neutrino search using the Borexino detector in coincidence with gamma-ray bursts (GRB), solar flares (SF) and gravitational wave (GW) events are presented. The correlated events with energies greater than 0.25 (1.0) MeV were looked for within a various time windows centered around the GRB, SF or GW detection time. As a...
The observation of very-high-energy gamma rays from X-ray binaries implies the possibility that they are cosmic ray (CR) sources in the Milky Way. The compact object in a binary system, e.g. a neutron star or black hole, can be the site for CR acceleration. Interactions of CRs can happen in the jet of the compact object, the wind, or the atmosphere of the companion star which produce...
The RENO experiment has successfully measured $\theta_{13}$ using the disappearance of electron anti-neutrinos in three-flavor neutrino oscillations. We search for sterile neutrinos in four-flavor oscillation model using 2200 days of data collected by the RENO experiment. We have not seen any positive signal and obtain an excluded region of the oscillation parameters. We present an excluded...
The Surface Detector (SD) of the Pierre Auger Observatory is used to search for ultra-high-energy (UHE) neutrinos of all flavours, which have energies beyond 0.1 EeV. They induce extensive air showers (EASs) that are efficiently detected and well separated from those produced by UHE cosmic rays. Additionally, the SD's large aperture leads to a UHE neutrino sensitivity competitive to that of...
The discovery of high-energy astrophysical neutrinos by IceCube in 2013 and of gravitational waves by LIGO in 2015 have enabled a new era of multi-messenger astronomy. Gravitational waves can identify the merging of compact objects such as neutron stars and black holes. These compact mergers, especially neutron star mergers, are potential neutrino sources. With the completion of LIGO-Virgo's...
Neutrino decoherence can result from coupling between neutrinos and their environment, including quantum gravitational fluctuations in the structure of space-time, producing characteristic damping signatures in neutrino probability over large distances. Here we present a study of the phenomenology of neutrino decoherence in atmospheric and astrophysical neutrinos resulting from heuristic...
The mixing of three active neutrino flavors is parameterized by the unitary PMNS matrix. If there are more than three neutrino flavors and if the extra generations are heavy isosinglets, the effective 3 × 3 mixing matrix for the three active neutrinos will be non-unitary. We have analyzed the latest T2K and NOνA data with the hypothesis of non-unitary mixing of the active neutrinos. We found...
The Short Baseline Neutrino (SBN) program comprises three detectors —
the Short Baseline Near Detector (SBND), MicroBooNE, and ICARUS — and
promises sensitivity to a variety of new physics models proposed
to explain the perplexing short-baseline neutrino anomalies. This poster will
describe ongoing developments to assess the SBN sensitivity to new physics
using the SBNfit fitting...
The recent demonstration of MeV-scale reconstruction capabilities in liquid argon time projection chambers (LArTPCs) allows for a variety of new physics studies. We examine the benefits of MeV-scale reconstruction in single-phase LArTPCs, in particular on supernova neutrino reconstruction, a major goal of DUNE. We also explore the utility of MeV-scale reconstruction for neutron calorimetry,...
This poster presents the application of sparse convolutional neural networks in three dimensions in the ProtoDUNE Liquid Argon Time Projection Chamber (LArTPC) detector, building on previous applications of the technique in other LArTPCs. Sparse convolutions allow for computationally efficient processing of very large and high-resolution three-dimensional images, making them a natural fit for...
Deployment of the Radio Neutrino Observatory Greenland (RNO-G) is planned to start in 2020 at Summit Station, Greenland. In the next few years, thirty-five stations will be deployed and RNO-G will also act as a pathfinder for IceCube-Gen2. The aim is to detect astrophysical neutrinos at energies beyond the ones thus far observed. The deep positioned trigger (100 m depth) maximizes the...
We study the discovery prospect of different three body lepton number violating~(LNV) meson decays $M_{1}^{-}\to\ell_{1}^{-}\ell_{2}^{-}M_{2}^{+}$ in the framework of right handed~(RH) neutrino extended Standard Model~(SM) at
NA62, LHCb at CERN, Belle II, SHiP, MATHUSLA and FCC-ee. We consider the effect of parent mesons velocity, as well as, the effect of finite detector size. Using the...
DARWIN will be a direct dark matter detection experiment using a multi-ton liquid xenon time projection chamber at its core. With 50 tonnes of natural xenon, DARWIN will be designed to explore the entire experimentally accessible parameter space for WIMPs. In addition, profiting from state-of-the-art techniques, DARWIN will achieve unprecedented levels of background, therefore creating the...
The LUX-ZEPLIN (LZ) experiment is a 7-tonne liquid xenon time projection chamber primarily designed to search for dark matter particles in the form of weakly interacting massive particles. Nonetheless, we can take advantage of the significant ${}^{136}$Xe mass (>600 kg) present in the active volume of the detector to look for neutrinoless double beta decay of that isotope. We report the...
The nEXO experiment is a proposed next-generation search for neutrinoless double beta decay ($0\nu\beta\beta$) of $^{136}$Xe based on a 5-tonne monolithic liquid xenon TPC. A detailed study of the expected sensitivity, published in 2016, calculated the 90% CL exclusion sensitivity on the $0\nu\beta\beta$ half-life to be $9.2\times10^{27}$ yrs. In this poster, we will present an updated...
The KM3NeT is a next generation neutrino telescope under construction in the Mediterranean sea. The primary goal of the low energy configuration, ORCA, is to measure oscillation parameters with atmospheric neutrinos, in particular the Neutrino Mass Ordering (NMO). In addition to this primary goal, ORCA will also be capable of constraining a number of non-standard physics scenarios such as...
We introduce the scientific opportunity that research reactors and nuclear power plants in Argentina represent for short baseline reactor neutrino experiments. Argentina has different kinds of nuclear reactors that can be accessible to perform a variety of experiments in diverse fields. There are research reactors aimed to function as radioisotopes generators, training facilities, R&D in...
LEGEND (Large Enriched Germanium Experiment for Neutrino-less Double-Beta Decay) is a ton-scale 76Ge-based neutrinoless double beta decay experimental program with discovery potential at a half-life greater than $10^{28}$ years.
The first 200-kg phase (LEGEND-200) is currently under construction and will start data taking in 2021. A key to achieve the projected half-life sensitivity of...
The Project 8 experiment is designed to directly measure the electron neutrino mass using cyclotron radiation emission spectroscopy~(CRES).
Using the cyclotron frequency as a proxy for kinetic energy, the experiment aims to measure the tritium beta-decay electron endpoint spectrum trapped in 1 T magnetic field to reach neutrino mass sensitivity of 40 meV/c$^2$.
Following the successful...
By the observation of geo-neutrinos originating from radioactive isotopes in the Earth (238U,232Th), we can know the amount of radioactive isotopes and the radiogenic heat which governs the Earth dynamics.
Ocean Bottom Detector can observe geo-neutrinos from the mantle directly. Unlike existing other neutrino detectors, OBD detects neutrinos on the seafloor. Given that the oceanic crust is...
This work represents an extension of the [MK model][1]. The MK model provides a full kinematic description of single pion production in the neutrino-nucleon interactions, including resonant and nonresonant interactions in the helicity basis, in order to study the interference effect. The resonant interactions of MK model are described by RS model. In the new approach, we use Rarita-Swinger...
The neutrino mixing matrix is characterized by singular values and
contractions. The method of unitary dilation is introduced to extend
3-dimensional mixing matrices to a full unitary matrix. The minimal
dimension of such an extension is not arbitrary but depends on
singular values. It means that singular values encode information
about the number of additional neutrinos. Taking this...
Super-Kamiokande (SK) observes about 2 muons a second at a depth of 1 km. A fraction of these muons shower, and sometimes create radioactive isotopes (spallation) which live from microseconds to seconds. This is the dominant background to neutrinos between 6 and 20 MeV, with oxygen spallation mostly caused by neutrons and pions. Detection of neutrons produced by muons serves both as an...
Borexino experiment, located at the Laboratori Nazionali del Gran Sasso, was built with a primary goal of the low-energy solar neutrino detection. In more than 12 years of data taking, Borexino has demonstrated the unprecedentedly high sensitivity towards solar neutrinos from the complete pp-chain, dominant process in the Sun fusion. After a number of developments in both hardware and...
Addressing the origin of the observed diffuse astrophysical neutrino flux is of paramount importance. In this context, Gamma-Ray Bursts (GRBs) are considered interesting candidate sources since they are potentially able to achieve the energetics required to reproduce the neutrino flux.
Using ANTARES data with the aim of constraining the contribution from the GRB population to the high-energy...
The GERDA experiment investigates lepton-number violation and whether neutrinos have a Majorana nature by searching for a rare nuclear transition called neutrinoless double beta decay (0vbb).
The statistical challenges that arise in the search for rare-processes: evaluating the discovery power, the limit setting power on the signal rate and the goodness of fit of the background for models...
The MAJORANA DEMONSTRATOR experiment is searching for neutrinoless double-beta decay (0$\nu\beta\beta$) in Ge-76 with an array of p-type, point-contact (PPC) Ge detectors. A total of 44 kg (30 kg enriched in Ge-76) of Ge detectors are split between two modules and operating in a low background passive and active shield since 2015 at SURF. An unprecedented energy resolution of 2.5 keV FWHM and...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose neutrino experiment which is under construction. The primary goal of JUNO is to determine the neutrino mass ordering and precisely measure the oscillation parameters by reactor anti-neutrinos. There will be about 20000 20-inch PMTs equipped for JUNO, which include 15000 MCP-PMTs and 5000 dynode-PMTs. To achieve the...
AMoRE is an experiment to search for the neutrinoless double beta decay using Mo-100 based scintillation crystals and a cryogenic detection technique. Detection of both thermal and scintillation signals using metallic magnetic calorimeter (MMC) sensors provides high energy resolution and efficient particle discrimination. From AMoRE-pilot phase, we have understood the sources of backgrounds...
In the search for the CP-violation in the leptonic sector, the next generation of neutrino experiments will consider new baselines and technologies to improve their sensitivity on δCP parameter. The future ESSνSB experiment aims at searching this asymmetry at 5σ significance level, in more than 60% of the leptonic Dirac δCP violating phase range, and measuring the phase value with precision,...
The LEGEND collaboration is searching for the ultra-rare process of neutrinoless double beta decay in 76Ge. The discovery of this decay would establish that the neutrino is its own antiparticle, with far-reaching implications in explaining the matter-antimatter asymmetry in our universe. A ton-scale array of germanium detectors, fabricated with ultra-low background materials and operated in a...
Observations of neutrino oscillations from the majority of experiments are consistent with a three-flavor framework. However, the excess of events seen by LSND and MiniBooNE may be incompatible with this model and, to explain these data using neutrino mixing, require an additional, sterile, neutrino. These intriguing results are inconclusive and are in tension with findings from other short-...
Current global constraints in neutrino mixing parameters translate to lax PMNS unitarity relations. In this work, we explore the lack of non-unitarity in the neutrino mixing matrix via the astrophysical neutrino flavor content in both standard paradigms, as well as those involving sterile neutrinos.
Astrophysical neutrino flavour composition is a sensitive tool to probe both non-unitarity...
The strategy to detect solar CNO neutrinos in Borexino is reported. Borexino is the only experiment that has measured the low-energy pp-chain solar neutrinos thanks to its exceptionally low radioactivity backgrounds. The CNO-cycle is a catalytic mechanism to fuse hydrogen into helium, and is important in most heavy stars. It has not been directed detected experimentally yet, but only as an...
The P-ONE experiment proposes a new neutrino telescope off the shore of British Columbia, which will allow us to search for astrophysical neutrino sources.
To overcome the challenges of a deep-sea installation, we are developing prototype mooring lines in collaboration with Ocean Networks Canada, which provides the infrastructure for various Oceanographic instruments.
The STRAW mooring lines...
Neutrino-nucleus elastic scattering provides a unique laboratory to study the quantum mechanical coherency effects in electroweak interactions. We present an analytical formulation [1] to quantify the coherency effects, relate this to nuclear form factors and experimental cross-section ratios, and characterize how its energy dependence leads to complementary among measurements at various...
For aboveground experiments, cosmic muons are common background sources. The ECHo experiment is designed for the determination of the effective electronneutrino-mass by the analysis of the endpoint region of the $^{163}$Ho EC spectrum. The fraction of events in the ROI below the $Q_{EC}$ value is of the order of $10^{-12}$. Thus, the background in that region requires a precise understanding...
Neutrino induced pion production in the resonance (RES) region is one of the most important interaction modes for the current and future generation long-baseline neutrino oscillation experiments. It is also sensitive to nuclear effects, including fermi motion, initial state nucleon correlations, and final state interactions etc., which affect event topology and energy reconstruction of RES...
FASER$\nu$ is a dedicated neutrino detector in the FASER experiment to study high-energy neutrinos from the LHC, which got approved by CERN in December 2019. A 1.2-tonnes emulsion-based detector will be located at 480 m downstream of the ATLAS interaction point. The unique experimental setup allows measuring three-flavor neutrino cross sections at the currently uncharted energy range between...
The COHERENT collaboration has made the first observations of coherent elastic neutrino-nucleus scattering (CEvNS) in multiple detectors. These observations depend on the decay-at-rest neutrino production at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory, but must contend with the substantial neutron production of the SNS. Small nuclear recoils are the observable...
Neutrinos travel nearly unattenuated over cosmological distances making them an excellent messenger to study high-energy processes occurring in the universe. IceCube, the world's largest and most sensitive astrophysical neutrino detector, reported a high-energy neutrino event on 22 September 2017 which was found to be coincident with a flaring blazar, TXS 0506+056. This first multi-messenger...