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...
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...
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...
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,...
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.
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....
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.
...
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 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...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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 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,...
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...
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 $\nu (\overline{\nu}) + e^- \to...
A review on neutrino electromagnetic properties and interactions is given. We consider constraints on neutrino magnetic and electric dipole moments, electric millicharge, charge radii and anapole moments from the terrestrial laboratory experiments and astrophysical observations. The main manifestation of neutrino electromagnetic interactions, such as: 1) the radiative decay in vacuum, in...
Neutrinoless double-beta decay (0νββ) is an experimentally sensitive avenue to probe the Majorana-versus-Dirac nature and mass scales of neutrinos. This work [1] quantitatively explores the interplay between exposure and background levels in 0νββ experiments with respect to their target sensitivities at the design stage. In particular, background reduction will be playing increasingly...
Current and future generation neutrino oscillation experiments aim towards a high-precision measurement of the oscillation parameters and that requires an unprecedented understanding of neutrino-nucleus scattering. Charged-current quasielastic–like (CCQE-like) scattering is the process in which the neutrino produces a charged lepton and a single proton in the final state without any additional...
CROSS (Cryogenic Rare-event Observatory with Surface Sensitivity) project is focused on 0$\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 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...
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...
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...
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...
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 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 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 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 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...
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....
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...
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...
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....
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...
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...
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 $\beta\beta$...
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...
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...
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...
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...
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...
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 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 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 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...
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...
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...
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 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...
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...
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...
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...
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...
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-...
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...
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...
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...
Borexino is a solar neutrino detector based on 280 tons of ultrapure liquid scintillator, located at the Laboratori Nazionali del Gran Sasso, Italy. Its latest primary goal (2016-2020) was the observation of neutrinos emitted from the CNO cycle, undetected so far. An accurate Monte Carlo simulation is essential to achieve this goal: the Borexino simulation package reproduces the detector...
The goal for the ECHo experiment is the determination of the effective electron neutrino mass by analyzing the electron capture (EC) spectrum of $^{163}$Ho. Metallic magnetic calorimeters enclosing $^{163}$Ho, achieved very good performance to conduct such an experiment. During the first phase of the experiment, ECHo-1k, the detector production and the implantation process of high purity ...
We explore a new tool in the ultra-high-energy neutrino detection toolkit: the radar echo method. Starting with the first confirmed observation of a radar echo detection from a high-energy particle cascade in dense media, detected in 2018 during experiment T576 at SLAC, we present a roadmap to take these lab-based experimental results into nature: The Radar Echo Telescope. This will be a first...
The Sanford Underground Research Facility (SURF) has been operating for over a decade as a facility dedicated to supporting underground research in rare-process physics, as well as offering research opportunities in other disciplines. SURF laboratory facilities include a Surface Campus as well as two main campuses at the 4850-foot level (4300 m.w.e.) that host a range of significant physics...
The Tritium Laboratory Karlsruhe (TLK) is a unique facility providing solutions for any needs concerning tritium. Ultimate handling expertise allows to supply gaseous tritium on the gram-scale with a current license of 40g in total.
TLK does not limit offerings to tritium supply but provides a broad variety of solutions for its detection in gaseous, liquid, and solid state with high...
The beta decay of molecular tritium (T$_2$) allows sensitive, kinematic probes of the neutrino mass scale, but analysis of the beta spectrum must account for electronic, vibrational and rotational excitations of the final-state molecule. While the final-state spectrum cannot be measured directly, experiments can access the probability that the daughter molecule dissociates following beta...
PROSPECT aims to measure highly enriched $^{235}$U reactor anti-neutrino energy spectrum with high precision and to model-independently search for eV$^2$ sterile neutrino oscillations. PROSPECT is an optical segmented detector filled with $\sim$4 ton $^6$Li-loaded liquid scintillator and deployed at $\sim$7m from compact reactor core in HFIR(High Flux Isotope Reactor).
In order to detect...
The RENO experiment has precisely measured the amplitude and frequency of reactor antineutrino oscillaion at Hanbit Nuclear Power Plant since Aug. 2011. The previously measured values based on ~2200 days of data were reported for publication in 2018. Since then, an additional ~700 day data has been analyzed with improved methods to obtain an updated result. The additional data were taken...
We will present the strategy to refurbish a simulation code ATMNC developed by M. Honda which provides an accurate atmospheric neutrino (atm-$\nu$) flux prediction and has greatly contributed to the neutrino experimental physics including Super-Kamiokande (SK).
The dominant uncertainty of the Honda's calculation arises from insufficient understanding of the hadron interactions inside air...
The large number of opportunities to study non-standard neutrinos interaction in the low energy range --below the inverse beta decay process-- along with the observation of the CEvNs interaction, have witnessed a growing interest during the last years. In this contest, we propose a short baseline reactor neutrino experiment to cover three orders of magnitude of unexplored energy range for...
The Water Cherenkov Monitor of Antineutrinos (WATCHMAN) is a planned demonstration of far-field reactor monitoring for nonproliferation. To date, antineutrino experiments dedicated to nonproliferation used compact sctintillator based detectors situated on the order of meters from the reactor core. This proximity to the reactor requires accommodations by the host facility, while detectors...
ZICOS is scintillator experiment for 0$\nu \beta \beta$ of $^{96}$Zr. In order to achieve sensitivity over $10^{27}$ years, ZICOS will use tons of $^{96}$Zr, and need to remove $^{208}$Tl backgrounds as observed by KamLAND-Zen one order of magnitude. For this purpose, we have developed new technique to distinguish the signal and background using Cherenkov light, and succeeded that 93% of...