E. Kearns
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View article: Search for neutron decay into an antineutrino and a neutral kaon in 0.401 megaton-years exposure of Super-Kamiokande
Search for neutron decay into an antineutrino and a neutral kaon in 0.401 megaton-years exposure of Super-Kamiokande Open
We searched for bound neutron decay via n → ν ¯ + K 0 predicted by the grand unified theories in 0.401 Mton · years exposure of all pure water phases in the Super-Kamiokande detector. About 4.4 times more data than in the pre…
View article: Measurement of the branching ratio of $\mathrm{^{16}N}$, $\mathrm{^{15}C}$, $\mathrm{^{12}B}$, and $\mathrm{^{13}B}$ isotopes through the nuclear muon capture reaction in the Super-Kamiokande detector
Measurement of the branching ratio of $\mathrm{^{16}N}$, $\mathrm{^{15}C}$, $\mathrm{^{12}B}$, and $\mathrm{^{13}B}$ isotopes through the nuclear muon capture reaction in the Super-Kamiokande detector Open
The Super-Kamiokande detector has measured solar neutrinos for more than $25$ years. The sensitivity for solar neutrino measurement is limited by the uncertainties of energy scale and background modeling. Decays of unstable isotopes with r…
View article: Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande
Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande Open
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 MeV to 10 GeV. These results are based on 4,270 days of da…
View article: First observation of antiproton annihilation at rest on argon in the LArIAT experiment
First observation of antiproton annihilation at rest on argon in the LArIAT experiment Open
We report the first observation and measurement of antiproton annihilation at rest on argon track and shower multiplicities and particle identification conducted with the LArIAT experiment. Stopping antiprotons from the Fermilab Test Beam …
View article: Data Release: Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande
Data Release: Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande Open
This data release accompanies the article ["Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande"](https://arxiv.org/abs/2505.04409). The data provided here includes observed average neutron multiplici…
View article: Measurements of Pion and Muon Nuclear Capture at Rest on Argon in the LArIAT Experiment
Measurements of Pion and Muon Nuclear Capture at Rest on Argon in the LArIAT Experiment Open
We report the measurement of the final-state products of negative pion and muon nuclear capture at rest on argon by the LArIAT experiment at the Fermilab Test Beam Facility. We measure a population of isolated MeV-scale energy depositions,…
View article: Neutron multiplicity measurement in muon capture on oxygen nuclei in the Gd-loaded Super-Kamiokande detector
Neutron multiplicity measurement in muon capture on oxygen nuclei in the Gd-loaded Super-Kamiokande detector Open
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 Cherenkov detectors. We measured neutron multiplicity in the…
View article: First Joint Oscillation Analysis of Super-Kamiokande Atmospheric and T2K Accelerator Neutrino Data
First Joint Oscillation Analysis of Super-Kamiokande Atmospheric and T2K Accelerator Neutrino Data Open
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 interaction model for events overlapping in neutrino energy and corr…
View article: First Joint Oscillation Analysis of Super-Kamiokande Atmospheric and T2K Accelerator Neutrino Data
First Joint Oscillation Analysis of Super-Kamiokande Atmospheric and T2K Accelerator Neutrino Data Open
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 interaction model for events overlapping in neutrino energy and corr…
View article: Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector
Measurements of the charge ratio and polarization of cosmic-ray muons with the Super-Kamiokande detector Open
We present the results of the charge ratio (R) and polarization (P0μ) measurements using decay electron events collected between September 2008 and June 2022 with the Super-Kamiokande detector. Because of its underground location and long …
View article: Search for proton decay via $p\rightarrow{e^+η}$ and $p\rightarrow{μ^+η}$ with a 0.37 Mton-year exposure of Super-Kamiokande
Search for proton decay via $p\rightarrow{e^+η}$ and $p\rightarrow{μ^+η}$ with a 0.37 Mton-year exposure of Super-Kamiokande Open
A search for proton decay into $e^+/μ^+$ and a $η$ meson has been performed using data from a 0.373 Mton$\cdot$year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of th…
View article: Development of a Data Overflow Protection System for Super-Kamiokande to Maximize Data from Nearby Supernovae
Development of a Data Overflow Protection System for Super-Kamiokande to Maximize Data from Nearby Supernovae Open
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 buffers of the SK analog-to-digital conversion board (QBEE) …
View article: Measurements of Pion and Muon Nuclear Capture at Rest on Argon in the LArIAT Experiment
Measurements of Pion and Muon Nuclear Capture at Rest on Argon in the LArIAT Experiment Open
We report the measurement of the final-state products of negative pion and muon nuclear capture at rest on argon by the LArIAT experiment at the Fermilab Test Beam Facility. We measure a population of isolated MeV-scale energy depositions,…
View article: New methods and simulations for cosmogenic induced spallation removal in Super-Kamiokande-IV
New methods and simulations for cosmogenic induced spallation removal in Super-Kamiokande-IV Open
Radioactivity induced by cosmic muon spallation is a dominant source of backgrounds for O(10 MeV) neutrino interactions in water Cherenkov detectors. In particular, it is crucial to reduce backgrounds to measure the solar neutrino spectru…
View article: Performance of SK-Gd’s Upgraded Real-time Supernova Monitoring System
Performance of SK-Gd’s Upgraded Real-time Supernova Monitoring System Open
Among multimessenger observations of the next Galactic core-collapse supernova, Super-Kamiokande (SK) plays a critical role in detecting the emitted supernova neutrinos, determining the direction to the supernova (SN), and notifying the as…
View article: Search for Periodic Time Variations of the Solar <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">B</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>8</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> Neutrino Flux between 1996 and 2018 in Super-Kamiokande
Search for Periodic Time Variations of the Solar Neutrino Flux between 1996 and 2018 in Super-Kamiokande Open
We report a search for time variations of the solar B8 neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino interact…
View article: Second gadolinium loading to Super-Kamiokande
Second gadolinium loading to Super-Kamiokande Open
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 efficiency to 75%, 26.1 tons of Gd2(SO4)3.8H2O was addition…
View article: Solar neutrino measurements using the full data period of Super-Kamiokande-IV
Solar neutrino measurements using the full data period of Super-Kamiokande-IV Open
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 of the dataset of SK-IV corresponds to 2970 days and the to…
View article: Second gadolinium loading to Super-Kamiokande
Second gadolinium loading to Super-Kamiokande Open
The first loading of gadolinium (Gd) into Super-Kamiokande in 2020 was\nsuccessful, and the neutron capture efficiency on Gd reached 50\\%. To further\nincrease the Gd neutron capture efficiency to 75\\%, 26.1 tons of $\\rm Gd_2(\\rm\nSO_4…
View article: Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment
Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment Open
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 detector. In June 2020, SK began a new experimental phase, …
View article: Solar neutrino measurements using the full data period of Super-Kamiokande-IV
Solar neutrino measurements using the full data period of Super-Kamiokande-IV Open
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 of the data set of SK-IV corresponds to $2970$~days and the…
View article: Searches for baryon number violation in neutrino experiments: A White Paper
Searches for baryon number violation in neutrino experiments: A White Paper Open
Baryon number conservation is not guaranteed by any fundamental symmetry within the standard model, and therefore has been a subject of experimental and theoretical scrutiny for decades. So far, no evidence for baryon number violation has …
View article: Searches for baryon number violation in neutrino experiments: a white paper
Searches for baryon number violation in neutrino experiments: a white paper Open
Baryon number conservation is not guaranteed by any fundamental symmetry within the standard model, and therefore has been a subject of experimental and theoretical scrutiny for decades. So far, no evidence for baryon number violation has …
View article: Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I-V
Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I-V Open
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) data set, including events from an expanded fiducial volu…
View article: Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment
Measurement of the neutrino-oxygen neutral-current quasielastic cross section using atmospheric neutrinos in the SK-Gd experiment Open
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 detector. In June 2020, SK began a new experimental phase, …
View article: Search for Periodic Time Variations of the Solar $^8$B Neutrino Flux between 1996 and 2018 in Super-Kamiokande
Search for Periodic Time Variations of the Solar $^8$B Neutrino Flux between 1996 and 2018 in Super-Kamiokande Open
We report a search for time variations of the solar $^8$B neutrino flux using 5804 live days of Super-Kamiokande data collected between May 31, 1996, and May 30, 2018. Super-Kamiokande measured the precise time of each solar neutrino inter…
View article: Erratum: Search for Cosmic-Ray Boosted Sub-GeV Dark Matter Using Recoil Protons at Super-Kamiokande [Phys. Rev. Lett. <b>130</b>, 031802 (2023)]
Erratum: Search for Cosmic-Ray Boosted Sub-GeV Dark Matter Using Recoil Protons at Super-Kamiokande [Phys. Rev. Lett. <b>130</b>, 031802 (2023)] Open
This corrects the article DOI: 10.1103/PhysRevLett.130.031802.
View article: Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water
Search for Astrophysical Electron Antineutrinos in Super-Kamiokande with 0.01% Gadolinium-loaded Water Open
We report the first search result for the flux of astrophysical electron antineutrinos for energies in the gadolinium-loaded Super-Kamiokande (SK) detector. In 2020 June, gadolinium was introduced to the ultrapure water of the SK det…
View article: Measurement of the cosmogenic neutron yield in Super-Kamiokande with gadolinium loaded water
Measurement of the cosmogenic neutron yield in Super-Kamiokande with gadolinium loaded water Open
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 background source for studies of MeV-scale neutrinos and searches f…