Description
Poster sessions will be held online in the 2D and 8-bit virtual environment of Gather.town. This is an online platform with which you will be able to interact with your own avatar. You will be able to see the avatars of other attendees and hold video conversations with multiple people at once.
The password for the poster room Gather.town is in your email (in the "4th Bulletin") and on the conference slack. There is a also a poster index web page, where you can search through all the poster contributions, find out where it is located, and read the abstract and the poster pdf itself.
The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino oscillation experiment. DUNE consists of a set of near and far detectors placed in the path of an intense neutrino beam created at Fermilab. This will allow us to assess fundamental features of neutrino oscillation physics, such as leptonic CP violation and the mass hierarchy, as well as supernovae and proton decay...
We propose a new approach to explore the neutral-current non-standard neutrino interactions (NSI) in atmospheric neutrino experiments using oscillation dips and valleys in reconstructed muon observables, at a detector like ICAL that can identify the muon charge. We focus on the flavor-changing NSI parameter $\varepsilon_{\mu\tau}$, which has the maximum impact on the muon survival probability...
This presentation will present an alternative interpretation and derivation of neutrino oscillations via a simplified mass model and well-known dynamical system methods. The derivation appears to resolve many well know experimental anomalies such as the short baseline anomaly and the LSND/MiniBoone results without requiring a fourth neutrino. A new measurable quantity defined as the Flavon...
We show that one of the simplest extensions of the Standard Model, the addition of a second Higgs doublet, when combined with a dark sector singlet scalar, allows us to: $i)$ explain the long-standing anomalies in the Liquid Scintillator Neutrino Detector (LSND) and MiniBooNE (MB) while maintaining compatibility with the null result from KARMEN, $ii)$ obtain, in the process, a portal to the...
The Deep Underground Neutrino Experiment (DUNE) will use a suite of large liquid argon (LAr) far detectors, 1.5 km deep underground and located 1300 kilometers from the LBNF beamline in the US. Four far detector modules are planned, each with a fiducial mass of 10 kt of LAr. At least the first two of these modules will be LAr Time Projection Chambers (TPC), and efforts have concentrated in the...
STEREO is a short baseline experiment measuring antineutrinos emitted by the highly-enriched compact core of the ILL reactor in Grenoble (France). It consists of a segmented detector, located at 10m from the core, aiming to search for oscillations towards sterile neutrinos and to provide an accurate measurement of the 235U fission antineutrino spectrum.
In this talk, we report the most...
MicroBooNE is an 85-ton active volume liquid argon time projection chamber (LArTPC) at Fermilab. Its excellent calorimetry and resolution, along with its exposure to two neutrino beamlines make it a powerful detector not just for neutrino physics, but also for BSM physics and astrophysics. The experiment has competitive sensitivity to Heavy Neutral Leptons arising in the leptonic decay modes...
We present the measurements of the nonreactor environmental background with ISMRAN(Indian Scintillator Matrix for Reactor Anti-Neutrinos) set up consisting of an array of 9$\times$10 Plastic Scintillator Bars(PSBs) at BARC, Mumbai. These measurements are useful in context of the ISMRAN set up, which will be used to measure reactor antineutrinos, through inverse beta decay(IBD) signal....
Liquid argon time projection chambers (LArTPCs) combine millimeter-scale particle tracking, calorimetric capabilities, and scalability - making them well-suited for observing neutrino interactions. A LArTPC feature that has received relatively less attention is their low energy threshold, which allows for the study of phenomena down to the MeV scale. We use truth-level Monte Carlo simulations...
The discovery of neutrino less double beta decay implies important physics related to the origin of matter: the Majorana nature of neutrinos and the lepton number violation. It can also reveal the absolute value and hierarchy of neutrino masses. Neutrino less double beta decay is considered to be a very rare phenomenon, requiring an extremely low background environment and a large number of...
The Deep Underground Neutrino Experiment (DUNE) is an upcoming neutrino physics experiment that will answer some of the most compelling questions in particle physics and cosmology. The DUNE far detectors employ silicon photomultipliers (SiPMs) to detect light produced by charged particles interacting in a large liquid argon time projection chamber (LarTPC).
The SiPMs are photosensors...
Here we explore a minimal model to understand the cobimaximal lepton mixing ansatz based on non-Abelain discrete flavor symmetry. As an example, we show that this mixing scheme can be reproduced within the framework of $A_4$ discrete flavor symmetry. Guided by the symmetry considered, we explicitly construct the relevant lepton mass matrices. Tiny neutrino mass and mixing are analyzed here...
CPT symmetry, which is the combination of Charge conjugation, Parity and Time reversal, constitutes one of the fundamental symmetries of nature. Although no definitive signal of CPT violation has been observed so far, there are many reasons to undertake a careful investigation of various low-energy phenomena which can provide better probes to test CPT symmetry. In this context, neutrino...
The determination of the neutrino flux presents a challenge for the current and upcoming long-baseline neutrino experiments. The dominant uncertainty comes from the hadronic cascade model in the beamline. Fermilab experiments, such as DUNE and NO$\nu$A, use external hadron production data to constrain the models in their simulations and predict the neutrino flux at their detectors....
Current limits for the tau-neutrino transition magnetic moment to a sterile neutrino are far weaker than its electron and muon counterparts. In this poster/talk I discuss on-going work to investigate possible constraints on the transition magnetic moment between the tau neutrino and an O(MeV) sterile neutrino at DUNE: the proposed neutrino-beam experiment at FermiLab. I compare this with...
We show how to factorize plane-wave matrix elements and Coulomb corrections in a toy model of neutrino nucleus scattering using an Eikonal approximation for distorted wavefunctions. A systematic approximation is developed and useful phenomenological applications are highlighted.
Neutrino oscillations in matter provide a unique probe of new physics. Leveraging the advent of neutrino appearance data from NOvA and T2K in recent years, we investigate the presence of CP-violating neutrino non-standard interactions in the oscillation data. We first show how to very simply approximate the expected NSI parameters to resolve differences between two long-baseline appearance...
DUNE is the next-generation US flagship neutrino experiment designed to measure neutrino CP violation and mass hierarchy decisively. DUNE's far detectors are based on the liquid argon time projection chamber (LArTPC) technology. LArTPC offers an excellent spatial resolution and potentially allows very good identification of individual particles, but neutrino event reconstruction in LArTPC...
The Deep Underground Neutrino Experiment (DUNE) is a next generation long baseline neutrino experiment for oscillation physics and proton decay studies. The primary physics goals of the DUNE experiment are to perform neutrino oscillation physics studies, search for proton decay, detect supernova burst neutrinos, make solar neutrino measurements and BSM searches. The liquid argon prototype...
Borexino is a 280-ton liquid scintillator detector located at the Laboratori Nazionali del Gran Sasso (LNGS), Italy and is one of the two detectors that has measured geoneutrinos so far. The unprecedented radio-purity of the scintillator, the shielding with highly purified water, and the placement of the detector at 3800 m w.e. depth have resulted in very low background levels, making Borexino...
The Liquid Argon Time Projection Chamber (LArTPC) is increasingly becoming the chosen technology for both current and future precision neutrino oscillation experiments. One of the primary challenges in employing LArTPC technology is characterizing the performance of this technology and quantifying the associated systematic uncertainties. The MicroBooNE experiment plays a crucial role in...
Since neutrinos were first proposed by Pauli, their mass has been a subject of intense theoretical and experimental research. These were postulated as massless particles due to the non-existence of right-hand neutrinos. Now that the existence of the mass of neutrinos has been proven, we are motivated to investigate the different ways in which it can be generated.
A Dirac seesaw type II...
We hereby present the study in arXiv:2008.11280 (under publication) where we demonstrate that the combined sensitivity of JUNO with NOvA and T2K experiments has the potential to yield the first fully resolved (≥5σ) measurement of neutrino Mass Ordering (MO) tightly linked to the JUNO schedule. Due to the absence of any a priori MO prediction and given its intrinsic binary outcome we highlight...
DUNE is a next generation long baseline neutrino experiment which will study the LBNF neutrino beam at FNAL. Precision measurements of neutrino oscillation parameters with DUNE require estimates of neutrino flux uncertainties. While the dominant uncertainties come from hadron production, uncertainties due to the engineering tolerances for the elements in the LBNF beamline used to focus the...
The Deep Underground Neutrino Experiment (DUNE) is a neutrino oscillation experiment which will utilize Liquid Argon Time Projection Chamber (LArTPC) technology to perform a wide array of neutrino physics, astrophysical phenomena, proton decay, and BSM studies. The accurate and precise detection and reconstruction of electrons are essential to achieve these goals. One important systematic...
We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of non-standard interactions (NSI) of neutrino. We derive approximate analytical expressions for the modified mass-mixing parameters in matter with NSI. We observe that only the NSI parameters in the (2,3) block, namely $\varepsilon_{\mu\tau}$ and $(\gamma - \beta)\equiv...
This talk presents a model of the electron-like excess observed by the MiniBooNE experiment comprised of oscillations involving a new mass state, $\nu_4$, at $\mathcal{O}(1)$ eV and a high mass state, $\mathcal{N}$, at $\mathcal{O}(100)$ MeV that decays to $\nu+\gamma$ via a dipole interaction.
Short baseline oscillation data sets (omitting MiniBooNE appearance data) are used to predict the...
The NUCLEUS experiment aims at a high-precision measurement of the coherent elastic neutrino-nucleus scattering (CEνNS). This process is a unique tool to search for new physics beyond the Standard Model and to understand the properties of its most elusive particles, neutrinos.
NUCLEUS will use CaWO4 and Al2O3 cryogenic detectors to perform precision measurements of CEvNS at unprecedentedly...
A detailed understanding of Earth's Matter effect is inevitable to correctly analyze the data from the upcoming high-precision long-baseline experiments to resolve the remaining fundamental unknowns such as neutrino mass ordering, leptonic CP violation and precision measurements of the oscillation parameters. In this paper, for the first time, we explore in detail the capability of Deep...
Neutrino BSM interactions and DM particles are open questions in particle physics. At IceCube, the detection of astrophysical neutrinos opens up new opportunities for probing such new interactions. We have explored the potential of IceCube in unravelling new interactions of neutrinos with both dark matter and ordinary matter. We show that DM interactions with astrophysical neutrinos can lead...
This work presents the capability of long-baseline experiments in establishing the unitarity of active-neutrino mixing by ruling out the non-unitary mixing scheme as a function of true values of Dirac CP-violating phase . It is found that T2HK can establish unitarity of active neutrino mixing above 2σ C.L. irrespective of neutrino mass hierarchy and true value of Dirac CP-violating phase ....
The origin of the electron-like events in excess of Standard Model predictions at MiniBooNE remains unknown. Recently, new physics explanations based on neutrino upscattering to unstable states have become increasingly popular. For the first time, we consider a detailed evaluation of the constraints on these so-called dark neutrino models set by the gaseous Argon TPC at ND280, the off-axis...
The MicroBooNE detector has an active mass of 85 tons of liquid argon and is located along the Booster Neutrino Beam (BNB) at Fermilab. It has a rich physics program including the search for a low-energy excess observed at MiniBooNE and measurements of neutrino-Argon interaction cross sections. In this poster, we present a procedure, using the Wiener-SVD unfolding method, to extract the...
Neutrinos emitted from a core-collapse supernova (SN) may undergo fast flavor
conversions almost immediately above the core, resulting in drastic consequences for the supernova explosion mechanism and nucleosynthesis. These fast flavor oscillation dynamics are independent of the neutrino mass, growing at the scale of the large neutrino-neutrino interaction strength (105 km−1 ) of the dense...
Borexino is a liquid-scintillator experiment designed and constructed for real-time detection of low energy solar neutrinos. It is installed at the underground INFN Laboratori Nazionali del Gran Sasso (L’Aquila, Italy) and started taking data in May 2007. Today, after a challenging campaign of hardware improvement aimed at controlling its temperature and reducing the intrinsic radioactive...
In this work, we investigate the effect of general neutrino interactions from a simplified model on the Coherent Elastic Neutrino Nucleus Scattering (CE$\nu$NS) framework. All the possible invariant bilinear combinations of current; scalar, pseudoscalar, vectorial, axial-vector, and tensorial are considered. We implement the prediction of the CEvNS process including the considered new...
The Deep Underground Neutrino Experiment (DUNE) is a cutting-edge experiment for neutrino science and physics beyond the Standard Model. The physics goals of DUNE are to perform neutrino oscillation physics, searches for physics beyond the Standard Model including baryon number violating processes, and studies of supernova burst neutrinos and other low-energy neutrino physics. The single-phase...
The absence of any definite signals of new physics at colliders and/or from precision measurements has gradually changed our method in searching for new physics: from specific UV models to a model-independent study in the EFT framework. In light of the rich data from current terrestrial neutrino oscillation experiments and the precision measurements of Neff now and in the near future, in this...
Large liquid argon time projection chambers (LAr TPCs) at SBN and DUNE will provide an unprecedented amount of information about GeV-scale neutrino interactions. By taking advantage of the excellent tracking and calorimetric performance of LAr TPCs, we present a novel method for estimating the neutrino energy in neutral current interactions that significantly improves upon conventional methods...
T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment located in Japan. One of the most challenging tasks of T2K is to determine whether CP is violated in the lepton sector, what the recent T2K results suggest. By utilizing the near detector (ND280) data, T2K can constrain neutrino interaction and flux uncertainties by fitting a parametrised model to data. This allows a...
The India-based Neutrino Observatory (INO) is a proposed underground facility to look for atmospheric neutrinos. Iron calorimeter (ICAL) is an upcoming detector at INO that holds the key to understanding several fundamental issues regarding the nature and interactions of atmospheric neutrinos. As a part of detector design, development, and characterization studies for INO, a prototype detector...
We investigate an inverse seesaw model based on U(1)_{B-L} gauge symmetry and A_5 modular symmetry. These symmetries helps to avoid unwanted terms and constrain the structure to acquire the inverse seesaw form. Then we can obtain some predictions in neutrino sector such as Dirac-CP phase and sum of neutrino mass, by numerical analysis. We also discuss implications to lepton flavour violation...
One of the basic propositions of quantum field theory is Lorentz invariance. In some string theory models Lorentz symmetry may break spontaneously at a very high energy scale (Planck scale). In a low energy effective field theory, such as in the Standard Model Extension (SME) of particle physics, one can observe such Lorentz Invariance Violation (LIV) in a perturbative way. The present and...
We study the physics potential of the long-baseline experiments T2HK, T2HKK and ESS$\nu$SB in the context of invisible neutrino decay.
We consider normal mass ordering and assume the state $\nu_{3}$ as unstable, decaying into sterile states during the flight and obtain constraints on the neutrino decay lifetime ($\tau_3$).
We find that T2HK, T2HKK and ESS$\nu$SB are sensitive to the...
One of the crucial aspects to reach the aimed energy resolution of 3% @ 1 MeV in the JUNO experiment will be the performance of the 20-inch photomultiplier tubes (PMTs) used in the detector. Up to 20’000 of these PMTs will be deployed in JUNO, of which each of them moreover has to fulfil dedicated quality requirements for several key characteristics (such as low dark rate, sufficient PDE,...
What if the dark matter content of the universe was made up of sterile neutrinos with a mass of the order of keV?
Currently, constraints from the measured relic abundance of dark matter and from observations in the X-ray band threaten the possibility of finding in terrestrial experiments a signal of such sterile neutrinos produced through oscillation and collisions in the early universe.
We...
KM3NeT is a next-generation neutrino telescope being deployed in the Mediterranean Sea. Its low energy configuration ORCA (Oscillations Research with Cosmics in the Abyss) is optimised for the detection of atmospheric neutrinos with energies above ∼1 GeV. The main research target of the ORCA detector is the measurement of the neutrino mass ordering and atmospheric neutrino oscillation...
The CONUS experiment, located close to the powerful reactor core of the nuclear power plant in Brokdorf (Germany), aims at the detection of elastic neutrino nucleus scattering in the fully coherent regime below 10 MeV neutrino energy. The achieved low background levels and the low threshold of the four CONUS germanium detectors allow in addition interesting searches for beyond standard model...
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ decay that has been able to reach the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of...
We discuss leptogenesis in the context of the recently proposed ``asymmetric texture'', where both quark and lepton masses and mixings are explained from $SU(5)$ grand unification and $\mathcal{T}_{13}$ family symmetry. In this setup, two large lepton mixing angles come from the tribimaximal (TBM) seesaw matrix with a phase and the small reactor angle is contributed entirely by the charged...
Significant progress has been made over the last several decades in understanding the phenomenon of neutrino oscillations, where flavor change is a consequence of neutrinos having mass and a nontrivial mixing between their mass and flavor eigenstates. Experimental data on neutrino oscillations have been collected in a number of regimes, including atmospheric, solar, reactor, and beam...
Modern neutrino physics contains a few anomalies that can not be described by the three-neutrino mixing and oscillation framework. Reactor neutrino experiments observed a deficit of the anti-neutrino flux at 2.6$\sigma$ level with respect to the prediction. Gallium detectors for solar neutrinos observed a deficit of events from radioactive calibration sources of neutrino ($^{37}$Ar and...
Elastic scattering of the neutrino with nucleus ($\nu A_{el}$) offers a unique laboratory to study Quantum Mechanical superpositions in electroweak interactions, towards which several experimental programs are being actively pursued. In the TEXONO experiment, we are currently focused to measure the $\nu A_{el}$ cross-section for low energy reactor neutrinos ($E_{\nu}$<10 MeV) at Kuo-Sheng...
In this work, we investigate a simple model which leads to a tiny Dirac neutrino mass due to the small expectation value of the scalar Higgs. The model consists of the two Higgs, one of which is the heavy scalar and the other is the light scalar. To construct the effective action of the Dirac neutrino field, we integrate out the scalar Higgs fields. In addition, we also study the properties of...
We consider heavy sterile neutrinos $\nu_s$ with mass in the range $10~\mathrm{MeV}≤m_s≤m_π∼135~\mathrm{MeV}$, which are thermally produced in the Early Universe, in collisional processes involving active neutrinos, and freezing out after the QCD phase transition. Notably, if these neutrinos decay after the active neutrino decoupling, they generate extra neutrino radiation and contribute to...
Since its inception, the Daya Bay reactor neutrino experiment has continued to produce world-leading measurements of the mixing angle $\theta_{13}$ and the effective mass splitting $\Delta m^2_{ee}$. Electron antineutrinos produced by six nuclear reactors in southern China, totaling 17.4 GW$_{\mathrm{th}}$, are observed by eight identically designed liquid scintillator detectors divided among...
The Photon Detection System (PDS) of the Deep Underground Neutrino Experiment (DUNE) will be based on the X-Arapuca (XA) technology to detect Liquid Argon (LAr) scintillation in the DUNE far detector. The PDS will be composed of 1,500 XA with approximate dimensions of 210 x 12 cm^2, located at the anode planes of the liquid argon time projection chamber (LArTPC). In the XA light trap device,...
FASERnu is a new detector designed to study high-energy neutrinos at the LHC. The detector will be installed 480 m downstream of the ATLAS interaction point. It will enable us to constrain, for the first time, the cross-sections of all three neutrino flavors in the energy range between 350 GeV and 5 TeV. In particular, tau-neutrino and electron-neutrino cross sections will be measured at the...
Measuring the solar neutrino flux over gigayear timescales could provide a new window to inform the Solar Standard Model as well as studies of the Earth's long-term climate. We demonstrate the feasibility of measuring the time-evolution of the $^8$B solar neutrino flux over gigayear timescales using paleo detectors, naturally occurring minerals which record neutrino-induced recoil tracks over...
Neutrino trident production (NTP) is sub-dominant standard model process where a neutrino interacts in the coulomb field of a nucleus and produces lepton-antilepton pair. At high neutrino energies, on-shell W Boson production is predicted to enhance the NTP cross-section significantly and increase the expected event rate in neutrino telescope detectors like IceCube. In this work, we are the...
Investigation of neutrino properties is one of the most essential interests for particle physics and for better understanding the evolution of our Universe. Crucial missing information could be provided by the observation of neutrinoless double beta-decay ($0\nu\beta\beta$), a rare decay that violates total lepton number by two units which makes it forbidden in the Standard Model of particle...
T2K experiment measures the neutrino oscillation parameters by observing $\nu_\mu$ ($\bar{\nu}_\mu$) disappearance and $\nu_e$ ($\bar{\nu}_e$) appearance from a $\nu_\mu$ ($\bar{\nu}_\mu$) beam. The events are observed in the near detector ND280 and the far detector Super-Kamiokande (SK) situated at 280 m and 295 km respectively from the beam production target. In SK, the products of $\nu$ and...
We present a novel framework based on $SU(2)_H$ horizontal symmetry, which generates a naturally large neutrino transition magnetic moment and explains the XENON1T electron recoil excess also predicts a positive shift in the muon anomalous magnetic moment. This shift is of the right magnitude to be consistent with the Brookhaven measurement as well as the recent Fermilab measurement of the...
A neutrino source based on decay of an intense muon beam would be ideal for measurement of neutrino oscillation parameters. A high-energy muon collider could be the most powerful and cost-effective collider approach in the multi-TeV regime. Muon beams may be created through the decay of pions produced in the interaction of a proton beam with a target. The muons are subsequently accelerated and...
We investigate if the CP violation necessary for successful electroweak baryogenesis may be sourced by the neutrino Yukawa couplings. In particular, we consider an electroweak scale Seesaw realization with sizable Yukawas where the new neutrino singlets form (pseudo)-Dirac pairs, as in the linear or inverse Seesaw variants. We find that the baryon asymmetry obtained strongly depends on how the...
In the constrained sequential dominance (CSD), tri-bimaximal mixing (TBM)
pattern in the neutrino sector has been explained, by proposing a certain
Yukawa coupling structure for the right-handed neutrinos of the model.
However, from the current experimental data it is known that the values
of neutrino mixing angles are deviated from the TBM values. In order to
explain this neutrino...
Collective neutrino oscillations are known to amplify anisotropies and inhomogeneities for supernova neutrinos. In this talk, I will consider neutrino oscillations in the early Universe, assumed to be almost perfectly isotropic and homogeneous. However, collective oscillations can, also in this case, amplify a small initial anisotropy by many orders of magnitude. This will be demonstrated in a...
LUX-ZEPLIN (LZ) is a 10-tonne xenon time projection chamber optimized for the detection of dark matter particles, that is expected to begin science operations in 2021 at Sanford Underground Research Facility, USA. Because of its large mass of natural xenon and very low background levels, LZ will be also able to conduct relevant research in several areas of neutrino physics. In this talk, I...
We present a new recently proposed chiral gauge anomaly flipped 341 model where leptons families are arranged in different SU(4) gauge group representations. The mass matrix of the neutral leptons which is a hybrid of type-II and type-III Seesaw mechanism is discussed.
The long-baseline neutrino oscillation experiments rely on detailed 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 final state neutrons. We are proposing a three-dimensional projection scintillator tracker as a near detector component in the next generation...
I will discuss a new Occam’s razor setup in the minimal type-I seesaw framework with maximally-restricted texture-zero Yukawa and mass matrices. In this setup, we include charged-lepton mixing parametrized by a single angle, which is predicted to be very close to the quark Cabibbo angle. In this case, compatibility with normally-ordered neutrino masses (currently preferred by data) is achieved...
In this talk we will present the first measurement of the neutron skin of cesium and iodine using electroweak probes, coherent elastic neutrino-nucleus scattering and atomic parity violation. This measurement, differently from hadronic probes, is model-independent and suggests a preference for nuclear models which predict large neutron skin values, with implications that range from neutron...
We study the capabilities of the DUNE near detector to probe deviations from unitarity of the leptonic mixing matrix, the 3+1 sterile formalism and NSI in detection and production, clarifying the relation and possible mappings among the three formalisms. We add to the current analyses in the literature the use of the charged current events for the ντ appearance channel and the consideration of...
The CENNS-10 experiment of the COHERENT collaboration has recently reported the first detection of coherent-elastic neutrino-nucleus scattering (CEvNS) in liquid Argon with more than 3σ significance. In this work, we exploit the new data in order to probe various interesting parameters which are of key importance to CEvNS within and beyond the Standard Model. A dedicated statistical analysis...
Inclusive cross section data for electron scattering from nuclei are crucial for validating neutrino scattering models. We present new results on very precise measurements of separated electron scattering structure functions (W2 and R) on H, D, and a variety of nuclear targets. The data covers a wide range of W and Q2 from the quasielastic through the resonance region and DIS As part of the...
Two-neutrino double beta (2$\nu\beta\beta$) decays are amongst the rarest nuclear processes ever observed. Precision studies of the electron sum energies require ultra-low background and an excellent understanding of the experiment’s response. Both are key features of the Germanium Detector Array (GERDA) experiment, which searched for neutrinoless double beta (0$\nu\beta\beta$) decay with...
The rise of the precision measurements in neutrino oscillation experiments marks a new era in flavour physics. With many of the standard oscillation parameters measured to nearly percent-level accuracy, the data from neutrino oscillation experiments can be used to test the fundamental laws of particle physics. We investigate whether non-minimal Lorentz invariance violation can solve the...
The complementarity between the medium-baseline reactor experiment JUNO and the capability of Hyper-Kamiokande to measure solar neutrinos is addressed. We focus on the future of the solar sector of neutrino oscillations in the presence of non-universal and flavour-changing non-standard interactions (NSI) with d-quarks. In an individual analysis of each experiment including NSI, the...
Decay of the inflaton or moduli which dominated the energy density of the universe at early times leads to a matter to radiation transition epoch. We consider nonthermal sterile dark matter (DM) particles produced as decay product during such transitions. The particles have a characteristic energy distribution—that associated with decays taking place in a matter dominated universe evolving to...
We study the Cabibbo suppressed production of hyperons ($\Lambda$ and $\Sigma$ baryons) in the interactions of antineutrinos and nuclei. This is a rare process and few measurements have been made, resulting in a poorly constrained cross section model, but upcoming experiments such as SBND [1] and DUNE are expected to obtain significantly greater statistics. In this poster we explore the...
The liquid xenon (LXe) detectors are being actively developed heavily for dark matter searches over the last decades. These detectors, which are operated in time projection chamber (TPC) mode, can strongly suppress the electronic recoil background, and detect very low energy recoils using "ionization only" channel. These excellent detector properties make it possible to detect the very low...
We study the phenomenology of the minimal $(2,2)$ inverse-seesaw model supplemented with Abelian flavour symmetries. To ensure maximal predictability, we establish the most restrictive flavour patterns which can be realised by those symmetries. This setup requires adding an extra scalar doublet and two complex scalar singlets to the Standard Model, paving the way to implement spontaneous CP...
Current long-baseline neutrino-oscillation experiments such as NO$\nu$A and T2K are mainly sensitive to physics in the neighbourhood of the first oscillation maximum of the $\nu_\mu \to \nu_e$ oscillation probability. The future Deep Underground Neutrino Experiment (DUNE) utilizes a wide-band beam tune optimized for CP violation sensitivity that fully covers the region of the...
Unified theories such as string theory suggests spontaneous Lorentz Invariance Violation(LIV) by introducing a new spacetime structure at the Planck Scale ($m_p \sim 10^{19}$ GeV). This effect can be observed at low energies with strength of $\sim 1/m_p$ using perturbative approach. In the Minimal Standard Model Extension (SME) framework, the neutrino mass-induced flavor oscillation gets...
The India-based tin detector (TIN.TIN) proposes to explore neutrinoless double beta decay (NDBD) in $^{124}Sn$ by employing an array of cryogenic tin-based bolometers, which will be operated at ~10 mK. However, pure tin is susceptible to tin pest, an allotropic phase transition of tin near ambient conditions which results in the cracking and disintegration of the tin sample. This poses a...
The Daya Bay Reactor Neutrino Experiment consists of eight identically designed antineutrino detectors placed underground at different baselines from six 2.9 GW$_\mathrm{th}$ nuclear reactors in China. With the largest sample of reactor antineutrino interactions to date, and a tight control of systematic uncertainties, the experiment is able to determine the $\theta_{13}$ mixing angle, search...
MicroBooNE is a liquid argon time projection chamber that operates in the Booster Neutrino Beam at Fermilab. The detector provides high-resolution imaging of neutrino interactions with a low threshold and full angular coverage. Thanks to a high expected event rate and several years of continuous operation, the MicroBooNE collaboration has obtained the world's largest dataset of neutrino-argon...
At present, cosmological observations set the most stringent bound on the neutrino mass scale. Within the standard cosmological model (ΛCDM), the Planck collaboration reports $\sum m_{\nu} < 0.12\,\text{eV}$ at 95 % CL. This bound, taken at face value, excludes many neutrino mass models. However, unstable neutrinos, with lifetimes shorter than the age of the universe $\tau_\nu \leq \tau_U$ ,...
RES-NOVA is a new proposed experiment for the hunt of neutrinos from core-collapse supernovae (SN) via coherent elastic neutrino-nucleus scattering (CEvNS) using an array of archaeological Pb-based cryogenic detectors. The high CEvNS cross-section on Pb and the ultra-high radiopurity of archaeological Pb enable the operation of a high statistics experiment equally sensitive to all neutrino...
In the presence of non-standard neutrino interactions (NSI), a degeneracy exists
in neutrino oscillation data, which involves the flipping of the octant of the mixing angle $\theta_{13}$ and the type of the neutrino mass ordering. In this article, we revisit the status of this degeneracy in the light of recent data on coherent elastic neutrino–nucleus scattering (CEνNS) from the COHERENT...
The Majorana Demonstrator is an experiment searching for neutrinoless double beta decay in $^{76}$Ge. The Demonstrator consists of two modules of p-type point-contact (PPC) germanium detectors operating at the 4850’ level of the Sanford Underground Research Facility in Lead, SD. The experiment has recently concluded its primary physics data taking campaign in March 2021, having operated...
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE) uses fully depleted high-resistivity CCDs (charge coupled devices) as particle detectors with the goal of measuring the coherent elastic scattering of reactor antineutrinos with silicon nuclei and probing physics beyond the Standard Model. The experiment is located at a distance of 30 m from the core of the 3.8 GW Angra 2 nuclear...
The XENON collaboration recently published results searching for nuclear recoils produced by solar $^8$B neutrinos in the XENON1T dark matter experiment. By lowering the energy threshold from 2.6 keV to 1.6 keV through a variety of novel analysis techniques, this result achieves unprecedented sensitivity to the coherent elastic scattering of solar neutrinos off xenon nuclei, an...
Searches for heavy neutral lepton production in K+ → e+N and K+ → +N decays using the data set collected by the NA62 experiment at CERN in 2016-18 are presented. Upper limits on the elements of the extended neutrino mixing matrix |Ue4|2 and |U4|2 are established at the levels of 10-9 and 10-8, respectively, improving on the earlier searches for heavy neutral lepton production and decays in...
The Mikheyev–Smirnov–Wolfenstein (MSW) effect is one of the key insights that helped form our current understanding of neutrino oscillations. Neutrinos interacting coherently with matter experience a form of refraction and oscillations in dense media can be a powerful tool to explore physics beyond the Standard Model. Atmospheric neutrinos, in particular, can make use of the entire Earth to...
The search for sterile neutrinos is among the brightest possibilities in our quest for understanding the microscopic nature of dark matter in our universe. These “mostly sterile” flavors are expected to be accompanied by heavy mass states, and thus their existence can be probed via momentum conservation with SM particles in radioactive decay. One way to observe these momentum recoil effects...
The KATRIN (Karlsruhe Tritium Neutrino) experiment investigates the kinematic endpoint of the tritium beta-decay spectrum to determine the effective mass of the electron anti-neutrino. The collaboration reported its first neutrino mass result in fall 2019: m$_\nu<$1.1~eV (90\% CL). Its unprecedented tritium source luminosity and spectroscopic quality make it a unique instrument to also search...
Nuclear effects in neutrino-nucleus scattering is one of the main sources of uncertainty in the analysis of neutrino oscillation experiments. At present most of these studies have been focused on inclusive scattering processes where only the scattered lepton is detected in the final state. This implies, due to the extended neutrino energy distribution (flux), that very different reaction...
nEXO is a 5 tonne monolithic liquid xenon (LXe) time projection chamber (TPC) planned to search for the neutrinoless double beta decay of $^{136}$Xe with an estimated half-life sensitivity of $\sim 10^{28}$ years at 90\% C.L., which was published in 2018. This talk will cover advancements made in terms of detector design, signal modelling and data analysis to support a refined estimate of the...
Neutrinoless double-$\beta$ decay (0$\nu\beta\beta$) is an experimentally sensitive avenue to probe the nature (Majorana versus Dirac) and exact mass of neutrinos. There are already intense activities worldwide committed to the experimental searches of 0$\nu\beta\beta$. This work [1] quantitatively explore the interplay between exposure and background levels in 0$\nu\beta\beta$ experiments at...
NEXT (Neutrino Experiment with a Xenon TPC) is a neutrinoless double beta decay experiment located at the Laboratorio Subterráneo de Canfranc (LSC, Spain). Its aim is to demonstrate that the neutrino is a Majorana particle by detecting the neutrinoless double beta decay process in xenon gas enriched in the $^{136}$Xe isotope. The detector technology used in NEXT is that of radiopure high...
The Jiangmen Underground Neutrino Observatory (JUNO) is a neutrino experiment aiming to detect antineutrinos emitted from nuclear reactors and coming from the interior of the Earth, as well as neutrinos from galactic and extragalactic sources. It comprises an active target mass made of 20 kton organic liquid scintillator, monitored by more than 40,000 photosensors. JUNO will shed light on...
The JSNS2 (J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source) experiment will search for neutrino oscillations over a short 24 m baseline with delta m square near 1 eV square at the J-PARC Materials and Life Science Experimental Facility. The JSNS2 detector is filled with 17 tons of gadolinium-loaded liquid scintillator (LS) with an additional 31 tons of unloaded LS in the...
The elastic scattering of neutrinos on an electron is a well known process with precise cross section predictions according to the standard model calculations. In this poster, we present an approach of measuring the neutrino-on-electron process using the data collected in the NOvA near detector. This measurement can be used to constrain the neutrino flux. The progress of the measuring...
From the discovery of the neutrino to the measurement of the last of the neutrino mixing parameters, nuclear reactors have proved indispensable in the study of these particles, of which much remains to be unveiled. Recent and past measurements using reactor neutrinos rely on the prediction of their spectrum, a non-trivial exercise involving ad- hoc methods and carefully selected assumptions. A...
The Short-Baseline Near Detector (SBND) will be one of three liquid Argon Time Projection Chamber (LArTPC) neutrino detectors positioned along the axis of the Booster Neutrino Beam (BNB) at Fermilab, as part of the Short-Baseline Neutrino (SBN) Program. The detector is currently in the construction phase and is anticipated to begin operation in the second half of 2022. SBND is characterised...
Charged currents are probed in low-energy precision $\beta$-decay experiments and at high-energy colliders, both of which aim to measure or constrain signals of beyond-the-Standard-Model physics. In light of future $\beta$-decay and LHC measurements that will further explore these non-standard interactions, we investigate what neutrinoless double-$\beta$ decay ($0\nu\beta\beta$) experiments...
The long-baseline neutrino experiment Tokai-to-Kamiokande (T2K) is located in Japan and is measuring neutrino oscillation parameters. An accelerator at J-PARC (Tokai) produces a beam of neutrinos or antineutrinos, that are then detected in a near detector complex (ND280) and at the far detector (Super-Kamiokande). The muon neutrino charged current interactions in ND280 are used to predict the...
The value of leptonic CP violation phase $\delta_{CP}$ and neutrino mass hierarchy are two of the current major open problems in neutrino oscillation physics. The quest to find the former is spearheaded by various accelerator based long-baseline neutrino experiments sensitive to $\delta_{CP}$. It is known that hierarchy-$\delta_{CP}$ ambiguity can affect the measurement of both parameters, and...
The neutrino flux is an essential input for oscillation analyses and neutrino cross section measurements in the T2K experiment. To predict the flux, we simulate the production of pions from the primary proton beam and their focusing inside magnetic horns, until they subsequently decay in flight to produce neutrinos. For hadronic interactions, dedicated hadron production data from NA61/SHINE...
The Forward Physics Facility (FPF) at LHC has the potential to explore the far-forward region at LHC. FASER$\nu$ is the dedicated program at FPF to study collider neutrinos. Charged current neutrino interactions have been extensively studied in the context of various experiments, including FASERν. The presence of a charged lepton in the final state allows for easy identification of candidate...
The development of cryogenic calorimeters to search for neutrinoless double-beta decay (0$\nu$DBD) has given in the last years increasingly promising results. To achieve a nearly background-free condition, scintillating crystals have been developed. Thanks to the light-assisted particle discrimination, this technology demonstrated the complete rejection of the dominant alpha background....
The study of neutrino properties in the precision era of oscillation physics requires a superior
knowledge of the flux, flavor, and energy of neutrino beams. The NP06/ENUBET experiment is
designing a facility in which large angle leptons produced in kaon decays are monitored in a segmented
calorimeter instrumenting the decay tunnel walls. The pion component of the neutrino flux can...
Hidden by their tiny mass, neutrinos may carry a profound secret with far-reaching consequences for both particle physics and cosmology. Given zero electric charge and no color, they may be Majorana particles - fermions which are their own anti-particles. Double beta decay offers a unique probe for this hypothesis. Finding solely two electrons sharing the full available decay energy, would...
IsoDAR is designed as an eV-scale sterile neutrino search motivated by anomalies in short-baseline oscillation experiments. Conceptually, IsoDAR is an intense neutrino source near a kton scale detector such as KamLAND or the planned LSC at Yemilab. $\overline{\nu}_e$'s are produced via $^8$Li isotope decay-at-rest, which is driven by a high current cyclotron. With 5 years of runtime,...
We consider the generation of neutrino masses via a singly-charged scalar singlet. Under general assumptions we identify two distinct structures for the neutrino mass matrix. This yields a constraint for the antisymmetric Yukawa coupling of the singly-charged scalar singlet to two left-handed lepton doublets, irrespective of how the breaking of lepton-number conservation is achieved. The...
DUNE is a next-generation, long-baseline neutrino oscillation experiment. Its main physics goals are the precise measurement of oscillation parameters, the determination of mass ordering and charge-parity symmetry violation along with BSM topics, including proton decay and supernova detection. The System for on-Axis Neutrino Detection (SAND) is part of the near detector complex. SAND is...
Neutrino oscillation experiments running at low to medium neutrino beam energies usually select "quasi-elastic" neutrino interactions, because they have an easily recognized signature and permit reasonably good neutrino energy reconstruction. Based on generic, simplified Monte-Carlo and oscillation tools, we discuss how the addition of "single pion production" (resonance) interactions could...
Violation of equivalence principle predicts that neutrinos of different flavour couple
differently with gravity. Such a scenario can give rise to gravity induced flavour oscillations
in addition to the usual mass-flavour neutrino oscillations during the neutrino propagation.
Even if the equivalence principle is indeed violated, their measure will be extremely small.
We explore the...
The Theia concept proposes a next-generation optical detector with broad physics capabilities. Advances in detector technology including water-based liquid scintillator targets, photon detectors with fast timing and spectral sensitivity, and novel reconstruction approaches enable a multi-kiloton scale detector with the ability to resolve Cherenkov and scintillation signals, providing a...
Multilayer insulation (MLI) technique is a robust passive thermal protection system being used in space cryogenics exploration programs as well as on the ground programs also. It is used as an excellent thermal insulator. Radiation, solid conduction and gas conduction are the significant modes of heat transfer in a cryostat. MLI technique used to degrade mainly the radiation heat load, by...
In the previous paper, we have investigated the time evolution of the lepton number of Majorana neutrinos in the Heisenberg picture. As a complimentary approach, we employ the Schrodinger picture. This enables us to investigate the time evolution of the initial state.
The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino oscillation experiment using liquid argon time projection chamber (LArTPC) technology. DUNE will have four Far Detector modules that will be low enough underground and with enough fiducial mass to search for nucleon decay and collect samples of atmospheric, cosmic, and solar neutrinos. To benchmark Far Detector...
ESSnuSB project is a design study for an upcoming accelerator-based neutrino oscillation experiment which will be driven by the ESS proton accelerator. The primary goal of this experiment is to measure the leptonic CP-violation phase with high precision at the second oscillation maximum. In this presentation, I will discuss the physics sensitivities of the proposed ESSnuSB experiment. In...
Neutrino scattering events with low hadronic recoil (low-nu events) have been used to understand the shape of the neutrino flux by various experiments including MINERvA. In this poster, we will show a novel method using low-nu events to understand the neutrino flux and detector energy scale and how MINERvA uses this sample to discover and fix the mismodeling of detector energy scale in the...
We consider the effect of a vector leptoquark $U_3$ , which can induce interactions between the
propagating neutrinos and the nucleons within the earth. We show that such interactions provide
a relatively large values of NSI parameter $\epsilon_{e\mu}$. Using these NSI parameters we successfully
explain the current discrepancy between the observed $\delta_{CP}$ results of T2K and NOvA. We...