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...
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...
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...
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...
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...
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...
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 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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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 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...
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...
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 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...
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 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...
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...
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...
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...
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...
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...
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 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...
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...
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....
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...
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 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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
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...
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 -...
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...
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,...
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...
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 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...
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...
Supernovae produce many of the chemical elements necessary for life and their remnants—neutron stars and black holes—are interesting astrophysical objects in their own right. However, the explosion mechanism of supernovae is not yet well understood.
Hyper-Kamiokande is a next-generation neutrino detector that will be able to observe the neutrino flux from the next galactic supernova in...
CUORE (Cryogenic Underground Observatory for Rare Events) is a tonne-scale cryogenic detector located at LNGS exploiting bolometric technique to search for neutrinoless double beta decay ($0 \nu \beta \beta$) of ${}^{130}$Te. The experimental signature is a sharp peak at the Q value in the summed energy spectrum of the emitted electrons.
In this contribution, we present a thorough...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purposed neutrino experiment currently under construction in South China. Due to it unprecedented requirement on the photocathode coverage rate in order to reach energy resolution , 20k 20-inch photomultipliers (PMTs) will be deployed in the detector system, including 5k conventional Hamamatsu dynode PMTs and 15k newly developed...
The J-PARC Sterile Neutrino Search at the J-PARC Spallation Neutron Source (JSNS$^2$) will begin data taking this year using DAQ electronics donated by the Double Chooz reactor neutrino experiment. Detailed here is the design of custom electronics for a planned upgrade to the JSNS$^{2}$ readout and trigger system. The upgraded electronics will digitize PMT signals at 500 MSPS with 14-bit...
Tien Shan High-Altitude Scientific Station is located at an altitude of 3340 m above sea level at a distance of 30 km from the city of Almaty. The station conducted a wide range of research projects. One of them is the “Hadron-55” complex with the help of which various effects and phenomena associated with the EAS passing through the Earth’s atmosphere are studied. The installation includes a...
It has been speculated by A.C. Hayes and collaborators that the excess of antineutrinos at 5 MeV (known as ”the bump”) could be due to deficient knowledge of the antineutrino spectrum. Cumulative fission product yields play a major role in this calculation and Hayes suggested, in particular, that 238U could be an important contributor to the bump.
Nonetheless, yields from 238U were often...
Neutrinos arrive undeflected and unattenuated from cosmic distances, making them unique windows to the high-energy universe. In 2013, IceCube opened the field of high-energy neutrino astronomy by observing a diffuse flux of neutrinos, and in 2017 demonstrated the value of neutrinos in multi-messenger astronomy by identifying a neutrino in coincidence with a flaring blazar. Here we describe the...
The RET-N project aims to detect > 10 PeV neutrino-initiated cascades in ice using the radar echo technique. This will be a novel way of detecting cosmic neutrinos that will complement current approaches by other experiments. Here we discuss details of detector optimisation studies for the RET-N pathfinder and prototyping project. Furthermore, we present the modelling efforts to predict the...
The nEXO experiment is a proposed tonne-scale liquid xenon detector to search for neutrinoless double decay ($0\nu\beta\beta$) of $^{136}$Xe, a theoretical process whose existence would have major implications for particle and nuclear physics. For an unambiguous detection of such a process, we require excellent energy resolution for events in our detector, which is directly driven by the...
The goal of the presented analysis is the cross-section measurement of the muon antineutrino single $\pi^{-}$ production ($\bar\nu_{\mu} + N \rightarrow \mu^{+} + \pi^{-} + X$) in the T2K near detector. This interaction mode is a background in Charged Current (CC) quasi-elastic sample in T2K oscillation analysis and its modelling needs to be constrained. The measurement will be double...
An accurate and efficient event reconstruction is an imperative element in realizing the full scientific capability of liquid argon time projection chambers (LArTPCs). The massive LArTPCs in current and future neutrino experiments create a need for new ideas and reconstruction approaches. In this poster, we describe the principles and algorithms of the novel Wire-Cell 3D event reconstruction...