Publications (51)
Search for neutron decay into an antineutrino and a neutral kaon in 0.401 megaton-years exposure of Super-Kamiokande
Kamiokande Collaboration, K. Yamauchi, K. Abe +261
We searched for bound neutron decay via predicted by the Grand Unified Theories in 0.401 Mtonyears exposure of all pure water phases in the Super-Kamiokande…
Diffuse Supernova Neutrino Background Search at Super-Kamiokande
Kamiokande Collaboration, K. Abe, C. Bronner +216
A new search for the diffuse supernova neutrino background (DSNB) flux has been conducted at Super-Kamiokande (SK), with a -ktonday exposure from its fourth…
Search for proton decay via and in 0.401 megaton-years exposure of Super-Kamiokande I-V
Kamiokande Collaboration, K. Abe, S. Abe +310
We searched for proton decay via and in 0.401 megaton-years of data collected in all pure water detector phases of Super-Kamiok…
Search for solar electron anti-neutrinos due to spin-flavor precession in the Sun with Super-Kamiokande-IV
Kamiokande Collaboration, K. Abe, C. Bronner +197
Due to a very low production rate of electron anti-neutrinos () via nuclear fusion in the Sun, a flux of solar is unexpected. An appearance of in so…
Search for supernova bursts in Super-Kamiokande IV
Kamiokande collaboration, M. Mori, K. Abe +242
Super-Kamiokande has been searching for neutrino bursts characteristic of core-collapse supernovae continuously, in real time, since the start of operations in 1996. The present wo…
The Hyper-Kamiokande Experiment -- Snowmass LOI
Kamiokande Collaboration, K. Abe, P. Adrich +387
Hyper-Kamiokande is the next generation underground water Cherenkov detector that builds on the highly successful Super-Kamiokande experiment. The detector which has an 8.4~times l…
New Methods and Simulations for Cosmogenic Induced Spallation Removal in Super-Kamiokande-IV
Kamiokande Collaboration, S. Locke, A. Coffani +215
Radioactivity induced by cosmic muon spallation is a dominant source of backgrounds for MeV neutrino interactions in water Cherenkov detectors. In particular, it…
The impact of spectroscopic incompleteness in direct calibration of redshift distributions for weak lensing surveys
W. G. Hartley, C. Chang, S. Samani +74
Obtaining accurate distributions of galaxy redshifts is a critical aspect of weak lensing cosmology experiments. One of the methods used to estimate and validate redshift distribut…
Neutron Tagging following Atmospheric Neutrino Events in a Water Cherenkov Detector
K. Abe, Y. Haga, Y. Hayato +301
We present the development of neutron-tagging techniques in Super-Kamiokande IV using a neural network analysis. The detection efficiency of neutron capture on hydrogen is estimate…
Neutron-Antineutron Oscillation Search using a 0.37 MegatonYear Exposure of Super-Kamiokande
Kamiokande Collaboration, K. Abe, C. Bronner +196
As a baryon number violating process with , neutron-antineutron oscillation () provides a unique test of baryon number conservation. We have performed a search f…
Search for astrophysical electron antineutrinos in Super-Kamiokande with 0.01wt% gadolinium-loaded water
M. Harada, K. Abe, C. Bronner +238
We report the first search result for the flux of astrophysical electron antineutrinos for energies O(10) MeV in the gadolinium-loaded Super-Kamiokande (SK) detector. In June 2020,…
Search for Tens of MeV Neutrinos associated with Gamma-Ray Bursts in Super-Kamiokande
Kamiokande Collaboration, A. Orii, K. Abe +216
A search for neutrinos produced in coincidence with Gamma-Ray Bursts(GRB) was conducted with the Super-Kamiokande (SK) detector. Between December 2008 and March 2017, the Gamma-ray…
Joint neutrino oscillation analysis from the T2K and NOvA experiments
NOvA, T2K Collaborations, : +597
The landmark discovery that neutrinos have mass and can change type (or "flavor") as they propagate -- a process called neutrino oscillation -- has opened up a rich array of theore…
Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I-V
Kamiokande Collaboration, T. Wester, K. Abe +233
We present a measurement of neutrino oscillation parameters with the Super-Kamiokande detector using atmospheric neutrinos from the complete pure-water SK I-V (April 1996-July 2020…
Signal selection and model-independent extraction of pionless charged-current muon neutrino cross section using double-differential kinematic imbalance observables on carbon and oxygen with the T2K experiment
K. Abe, S. Abe, H. Adhikary +402
We present the first joint measurement of muon neutrino CC interactions on carbon and oxygen targets, in two double-differential kinematic imbalance (KI) observable spaces,…
Neutron multiplicity measurement in muon capture on oxygen nuclei in the Gd-loaded Super-Kamiokande detector
Kamiokande Collaboration, S. Miki, K. Abe +282
In recent neutrino detectors, neutrons produced in neutrino reactions play an important role. Muon capture on oxygen nuclei is one of the processes that produce neutrons in water C…
Testing Non-Standard Interactions Between Solar Neutrinos and Quarks with Super-Kamiokande
Kamiokande Collaboration, P. Weatherly, K. Abe +268
Non-Standard Interactions (NSI) between neutrinos and matter affect the neutrino flavor oscillations. Due to the high matter density in the core of the Sun, solar neutrinos are sui…
Searching for neutrinos from solar flares across solar cycles 23 and 24 with the Super-Kamiokande detector
K. Okamoto, K. Abe, Y. Hayato +242
Neutrinos associated with solar flares (solar-flare neutrinos) provide information on particle acceleration mechanisms during the impulsive phase of solar flares. We searched using…
Search for proton decay via in 0.37 megaton-years exposure of Super-Kamiokande
Kamiokande Collaboration, R. Matsumoto, K. Abe +229
We searched for proton decay via in 0.37\,Mtonyears of data collected between 1996 and 2018 from the Super-Kamiokande water Cherenkov experiment. The selection…
Search for neutrinos in coincidence with gravitational wave events from the LIGO-Virgo O3a Observing Run with the Super-Kamiokande detector
Kamiokande collaboration, K. Abe, C. Bronner +209
The Super-Kamiokande detector can be used to search for neutrinos in time coincidence with gravitational waves detected by the LIGO-Virgo Collaboration (LVC). Both low-energy ($7-1…
First Measurement of the Electron Neutrino Charged-Current Pion Production Cross Section on Carbon with the T2K Near Detector
K. Abe, S. Abe, R. Akutsu +392
The T2K Collaboration presents the first measurement of electron neutrino-induced charged-current pion production on carbon in a restricted kinematical phase space. This is perform…
First joint oscillation analysis of Super-Kamiokande atmospheric and T2K accelerator neutrino data
Super-Kamiokande, T2K collaborations, : +545
The Super-Kamiokande and T2K collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interacti…
Search for Diffuse Supernova Neutrino Background with 956.2 days of Super-Kamiokande Gadolinium Dataset
K. Abe, S. Abe, Y. Asaoka +245
We report the search result for the Diffuse Supernova Neutrino Background (DSNB) in neutrino energies beyond 9.3~MeV in the gadolinium-loaded Super-Kamiokande (SK) detector with $2…
Search for Periodic Time Variations of the Solar B Neutrino Flux between 1996 and 2018 in Super-Kamiokande
K. Abe, C. Bronner, Y. Hayato +233
We report a search for time variations of the solar B neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiok…
Modeling Scintillation Photon Transport and Reconstruction Algorithms for the Time-of-Flight Detector in the T2K Neutrino Experiment
C. Alt, A. Blanchet, S. Bordoni +18
The T2K ND280 upgrade aims to reduce the systematic uncertainty of the CP-violating phase, , to reject non-CP violation hypothesis at confidence level. A crucial com…
Performance of SK-Gd's Upgraded Real-time Supernova Monitoring System
Y. Kashiwagi, K. Abe, C. Bronner +236
Among multi-messenger observations of the next galactic core-collapse supernova, Super-Kamiokande (SK) plays a critical role in detecting the emitted supernova neutrinos, determini…
Development of Faster and More Accurate Supernova Localization at Super-Kamiokande
K. Abe, Y. Asaoka, M. Harada +272
The next nearby core-collapse supernova (SN) promises to yield a treasure of scientific information through multi-messenger astronomy. Early observations of the shock breakout (SBO…
Measurement of the solar neutrino interaction rate below 3.49 MeV in Super-Kamiokande-IV
Kamiokande Collaboration, A. Yankelevich, K. Abe +250
Super-Kamiokande (SK) has observed solar neutrino elastic scattering at recoil electron kinetic energies () as low as 3.49 MeV to study neutrino flav…
Measurement of the cosmogenic neutron yield in Super-Kamiokande with gadolinium loaded water
Kamiokande Collaboration, M. Shinoki, K. Abe +238
Cosmic-ray muons that enter the Super-Kamiokande detector cause hadronic showers due to spallation in water, producing neutrons and radioactive isotopes. Those are a major backgrou…
First Gadolinium Loading to Super-Kamiokande
K. Abe, C. Bronner, Y. Hayato +212
In order to improve Super-Kamiokande's neutron detection efficiency and to thereby increase its sensitivity to the diffuse supernova neutrino background flux, 13 tons of $\rm Gd_2(…
Supernova Model Discrimination with Hyper-Kamiokande
Kamiokande Collaboration, K. Abe, P. Adrich +499
Core-collapse supernovae are among the most magnificent events in the observable universe. They produce many of the chemical elements necessary for life to exist and their remnants…
First Associated Neutrino Search for a Failed Supernova Candidate with Super-Kamiokande
F. Nakanishi, K. Abe, S. Abe +243
In 2024, a failed supernova candidate, M31-2014-DS1, was reported in the Andromeda galaxy (M31), located at a distance of approximately 770 kpc. In this paper, we search for neutri…
TeV-scale neutrino cross-section measurement using upward through-going muons in Super-Kamiokande
N. Bhuiyan, K. Abe, Y. Asaoka +248
Neutrinos provide a unique probe of both particle physics and the high-energy universe, traversing astronomical distances with minimal interaction. Their charged-current scattering…
Search for proton decay via and with a 0.37 Mton-year exposure of Super-Kamiokande
Kamiokande Collaboration, N. Taniuchi, K. Abe +288
A search for proton decay into and a meson has been performed using data from a 0.373 Mtonyear exposure (6050.3 live days) of Super-Kamiokande. Compared to p…
Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande
Kamiokande collaboration, S. Han, K. Abe +280
We present measurements of total neutron production from atmospheric neutrino interactions in water, analyzed as a function of electron-equivalent visible energy over a range of 30…
Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector
H. Kitagawa, T. Tada, K. Abe +253
We present the results of the charge ratio () and polarization () measurements using the decay electron events collected from 2008 September to 2022 June by the Super-…
Testing T2K's Bayesian constraints with priors in alternate parameterisations
The T2K Collaboration, K. Abe, S. Abe +400
Bayesian analysis results require a choice of prior distribution. In long-baseline neutrino oscillation physics, the usual parameterisation of the mixing matrix induces a prior tha…
Pulse Shape Particle Identification by a Single Large Hemispherical Photo-Multiplier Tube
S. Samani, S. Mandalia, C. Argüelles +8
In neutrino experiments, hemispherical photomultiplier tubes (PMTs) are often used to cover large surfaces or volumes to maximize the photocathode coverage with a minimum number of…
Introducing a Markov Chain-Based Time Calibration Procedure for Multi-Channel Particle Detectors: Application to the SuperFGD and ToF Detectors of the T2K Experiment
S. Abe, H. Alarakia-Charles, I. Alekseev +190
Inter-channel mis-synchronisation can be a limiting factor to the time resolution of high performance timing detectors with multiple readout channels and independent electronics un…
Measurement of the branching ratio of , , , and isotopes through the nuclear muon capture reaction in the Super-Kamiokande detector
Y. Maekawa, K. Abe, S. Abe +263
The Super-Kamiokande detector has measured solar neutrinos for more than years. The sensitivity for solar neutrino measurement is limited by the uncertainties of energy scale…
Constraining Neutrino Interaction Uncertainties for Neutrino Oscillation Measurements at the T2K Experiment
K. Abe, S. Abe, H. Adhikary +438
In the context of neutrino oscillation measurements from the T2K experiment, the off-axis near detector ND280 plays a crucial role in constraining the incoming neutrino flux and ne…
Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment
S. Sakai, K. Abe, C. Bronner +233
We report the first measurement of the atmospheric neutrino-oxygen neutral-current quasielastic (NCQE) cross section in the gadolinium-loaded Super-Kamiokande (SK) water Cherenkov…
Solar neutrino measurements using the full data period of Super-Kamiokande-IV
Kamiokande Collaboration, K. Abe, C. Bronner +322
An analysis of solar neutrino data from the fourth phase of Super-Kamiokande~(SK-IV) from October 2008 to May 2018 is performed and the results are presented. The observation time…
First double-differential measurement of pionless charged-current muon neutrino interactions using kinematic imbalance observables on carbon and oxygen with the T2K experiment
K. Abe, S. Abe, H. Adhikary +402
The T2K experiment measured the muon-neutrino charged‑current cross section without pions on carbon and oxygen using kinematic imbalance observables, providing double‑differential…
Measurement of muon neutrino induced charged current interactions without charged pions in the final state using a new T2K off-axis near detector WAGASCI-BabyMIND
K. Abe, S. Abe, R. Akutsu +398
We report a flux-integrated cross section measurement of muon neutrino interactions on water and hydrocarbon via charged current reactions without charged pions in the final state…
Pre-Supernova Alert System for Super-Kamiokande
Kamiokande Collaboration, L. N. Machado, K. Abe +223
In 2020, the Super-Kamiokande (SK) experiment moved to a new stage (SK-Gd) in which gadolinium (Gd) sulfate octahydrate was added to the water in the detector, enhancing the effici…
Development of a data overflow protection system for Super-Kamiokande to maximize data from nearby supernovae
M. Mori, K. Abe, Y. Hayato +252
Neutrinos from very nearby supernovae, such as Betelgeuse, are expected to generate more than ten million events over 10\,s in Super-Kamokande (SK). At such large event rates, the…
Second gadolinium loading to Super-Kamiokande
K. Abe, C. Bronner, Y. Hayato +246
The first loading of gadolinium (Gd) into Super-Kamiokande in 2020 was successful, and the neutron capture efficiency on Gd reached 50\%. To further increase the Gd neutron capture…
Search for nucleon decay via and in 0.484 Mton-year of Super-Kamiokande data
Kamiokande Collaboration, S. Jung, K. Abe +243
We present the results of searches for nucleon decays via and using a 0.484 Mtyr exposure of Super-Kamiokande I-V data covering…
Results from the T2K experiment on neutrino mixing including a new far detector -like sample
The T2K Collaboration, K. Abe, S. Abe +404
We have made improved measurements of three-flavor neutrino mixing with 19.7(16.3) protons on target in (anti-)neutrino-enhanced beam modes. A new sample of muon-ne…
Search for Cosmic-ray Boosted Sub-GeV Dark Matter using Recoil Protons at Super-Kamiokande
Kamiokande Collaboration, K. Abe, Y. Hayato +218
We report a search for cosmic-ray boosted dark matter with protons using the 0.37 megatonyears data collected at Super-Kamiokande experiment during the 1996-2018 period (SK…