Publications (60)
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…
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…
Indirect Search for Dark Matter from the Galactic Center and Halo with the Super-Kamiokande Detector
Kamiokande Collaboration, K. Abe, C. Bronner +269
We present a search for an excess of neutrino interactions due to dark matter in the form of Weakly Interacting Massive Particles (WIMPs) annihilating in the galactic center or hal…
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…
Performance of RHICf detector during operation in 2017
O. Adriani, E. Berti, L. Bonechi +15
In the RHIC forward (RHICf) experiment, an operation with pp collisions was performed at 510 GeV from 24-27 June 2017. The performances, energy and position resoluti…
Measurement of very forward neutron energy spectra for 7 TeV proton--proton collisions at the Large Hadron Collider
O. Adriani, E. Berti, L. Bonechi +28
The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is on…
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…
Letter of intent; Precise measurements of very forward particle production at RHIC
Y. Itow, H. Menjo, G. Mitsuka +8
In this paper, we propose an experiment for the precise measurements of very forward particle production at RHIC. The proposal is to install a LHCf-like calorimeter in the ZDC inst…
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…
Measurement of forward neutral pion transverse momentum spectra for = 7TeV proton-proton collisions at LHC
O. Adriani, L. Bonechi, M. Bongi +26
The inclusive production rate of neutral pions in the rapidity range greater than has been measured by the Large Hadron Collider forward (LHCf) experiment during LHC $\sqrt…
Proposal; Precise measurements of very forward particle production at RHIC
Y. Itow, H. Menjo, T. Sako +11
We propose a new experiment Relativistic Heavy Ion Collider forward (RHICf) for the precise measurements of very forward particle production at RHIC. The proposal is to install the…
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…
Measurement of energy flow, cross section and average inelasticity of forward neutrons produced in proton-proton collisions with the LHCf Arm2 detector
O. Adriani, E. Berti, L. Bonechi +20
In this paper, we report the measurement of the energy flow, the cross section and the average inelasticity of forward neutrons (+ antineutrons) produced in TeV pro…
Search for proton decay via and with an enlarged fiducial volume in Super-Kamiokande I-IV
Kamiokande Collaboration, A. Takenaka, K. Abe +211
We have searched for proton decay via and modes with the enlarged fiducial volume data of Super-Kamiokande from April 1996 to May 2018, which corresp…
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 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…
Measurement of the transverse single-spin asymmetry for forward neutron production in a wide range in polarized collisions at GeV
M. H. Kim, O. Adriani, E. Berti +22
Transverse single-spin asymmetries of forward neutrons at pseudorapidities larger than 6 had only been studied in the transverse momentum range of $p_{\textrm{T}}…
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…
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…
Early results of the LHCf Experiment and their contribution to Ultra-High-Energy Cosmic Ray Physics
O. Adriani, L. Bonechi, M. Bongi +30
LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating ha…
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…
Ground-based Observations of Temporal Variation of Cosmic Ray Spectrum during Forbush Decreases
W. Mitthumsiri, D. Ruffolo, K. Munakata +29
Observations of temporary Forbush decreases (FDs) in the Galactic cosmic ray (GCR) flux due to passage of solar storms are useful for space weather studies and alerts. Here we intr…
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 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…
Measurement of forward photon production cross-section in proton-proton collisions at = 13 TeV with the LHCf detector
O. Adriani, E. Berti, L. Bonechi +24
In this paper, we report the production cross-section of forward photons in the pseudorapidity regions of and , measured by the LHCf experiment…
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-…
Measurement of inclusive forward neutron production cross section in proton-proton collisions at with the LHCf Arm2 detector
O. Adriani, E. Berti, L. Bonechi +25
In this paper, we report the measurement relative to the production of forward neutrons in proton-proton collisions at obtained using the LHCf Arm2 det…
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…
Transverse single-spin asymmetry for very forward neutral pion production in polarized collisions at GeV
M. H. Kim, O. Adriani, E. Berti +22
Transverse single-spin asymmetries of very forward neutral pions generated in polarized collisions allow us to understand the production mechanism in terms of perturbative…
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…
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…
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…
Transverse single spin asymmetry for very forward production in polarized proton-proton collisions at = 510 GeV
M. H. Kim, B. Hong, Y. Goto +19
Transverse single spin asymmetry, , of very forward production from polarized collisions provides new information toward an understanding of its production…
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…
Measurements of longitudinal and transverse momentum distributions for neutral pions in the forward-rapidity region with the LHCf detector
O. Adriani, E. Berti, L. Bonechi +25
The differential cross sections for inclusive neutral pions as a function of transverse and longitudinal momentum in the very forward rapidity region have been measured at the Larg…
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…
Measurement of zero degree single photon energy spectra for sqrt(s) = 7TeV proton-proton collisions at LHC
O. Adriani, L. Bonechi, M. Bongi +32
In early 2010, the Large Hadron Collider forward (LHCf) experiment measured very forward neutral particle spectra in LHC proton-proton collisions. From a limited data set taken und…
The performance of the LHCf detector for hadronic showers
K. Kawade, O. Adriani, L. Bonechi +24
The Large Hadron Collider forward (LHCf) experiment has been designed to use the LHC to benchmark the hadronic interaction models used in cosmic-ray physics. The LHCf experiment me…
Measurement of forward photon production cross-section in pp collisions at = 510 GeV with RHICf detector
O. Adriani, E. Berti, L. Bonechi +23
The paper reports measurements of the inclusive differential cross-section for forward photons produced in proton‑proton collisions at √s = 510 GeV using the RHICf detector, coveri…
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…
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…
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…
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…
Transverse momentum distribution and nuclear modification factor of forward neutral pion in proton--lead collisions at TeV
O. Adriani, E. Berti, L. Bonechi +26
The transverse momentum () distribution for inclusive neutral pions in the very forward rapidity region has been measured, with the Large Hadron Collider forward detect…
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…
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…
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…
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…
Measurement of zero degree inclusive photon energy spectra for 900 GeV proton-proton collisions at LHC
O. Adriani, L. Bonechi, M. Bongi +25
The inclusive photon energy spectra measured by the Large Hadron Collider forward (LHCf) experiment in the very forward region of LHC proton-proton collisions at 900 Ge…