Search for proton decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ with an enlarged fiducial volume in Super-Kamiokande I-IV

Abstract

We have searched for proton decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ modes with the enlarged fiducial volume data of Super-Kamiokande from April 1996 to May 2018, which corresponds to 450 kton$\cdot$years exposure. We have accumulated about 25% more livetime and enlarged the fiducial volume of the Super-Kamiokande detector from 22.5 kton to 27.2 kton for this analysis, so that 144 kton$\cdot$years of data, including 78 kton$\cdot$years of additional fiducial volume data, has been newly analyzed. No candidates have been found for $p\to e^{+}{\pi }^0$ and one candidate remains for $p\to {\mu }^{+}{\pi }^0$ in the conventional 22.5 kton fiducial volume and it is consistent with the atmospheric neutrino background prediction. We set lower limits on the partial lifetime for each of these modes: $\tau /B(p\to e^{+}{\pi }^0)>2.4\times 10^{34}$ years and $\tau /B(p\to {\mu }^{+}{\pi }^0)>1.6\times 10^{34}$ years at 90% confidence level.

arXiv comment16 pages, 10 figures

References in corpus (22)

• Particle Dark Matter: Evidence, Candidates and Constraints
• A Measurement of Atmospheric Neutrino Oscillation Parameters by Super-Kamiokande I
• Atmospheric neutrino oscillation analysis with external constraints in Super-Kamiokande I-IV
• Improvement of low energy atmospheric neutrino flux calculation using the JAM nuclear interaction model
• Search for Proton Decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ in 0.31 megaton$\cdot$years exposure of the Super-Kamiokande Water Cherenkov Detector
• Search for Proton Decay via p -> e+ pi0 in a Large Water Cherenkov Detector
• Calibration of the Super-Kamiokande Detector
• Search for Proton Decay via p -> e^+ pi^0 and p -> mu^+ pi^0 in a Large Water Cherenkov Detector
• Grand Unified Theories and Supersymmetry in Particle Physics and Cosmology
• High-speed charge-to-time converter ASIC for the Super-Kamiokande detector
• Axion Predictions in $SO(10)\times U(1{)}_{\mathrm{PQ}}$ Models
• Form Factors in the Quark Resonance Model
• Setting Confidence Belts
• Asymmetric Dark Matter Models in SO(10)
• Proton Decay: Flipped vs Unflipped SU(5)
• Axion Dark Matter, Proton Decay and Unification
• On the Origin of Two-Loop Neutrino Mass from SU(5) Grand Unification
• Search for proton decay into three charged leptons in 0.37 megaton-years exposure of the Super-Kamiokande
• Seesaw Scale, Unification, and Proton Decay
• Nucleon decay via dimension 6 operators in anomalous U(1)_A SUSY GUT
• Flavor changing nucleon decay
• Experimental study of the atmospheric neutrino backgrounds for proton decay to positron and neutral pion searches in water Cherenkov detectors

Cited by in corpus (67)

• Superheavy quasi-stable strings and walls bounded by strings in the light of NANOGrav 15 year data
• Neutron Stars with Baryon Number Violation, Probing Dark Sectors
• Atmospheric neutrino oscillation analysis with neutron tagging and an expanded fiducial volume in Super-Kamiokande I-V
• Inflation, superheavy metastable strings and gravitational waves in non-supersymmetric flipped SU(5)
• Testing Realistic $SO(10)$ SUSY GUTs with Proton Decay and Gravitational Waves
• Monopoles, Strings and Gravitational Waves in Non-minimal Inflation
• Pseudo-Nambu-Goldstone Dark Matter Model Inspired by Grand Unification
• JUNO Sensitivity on Proton Decay $p\to \bar{\nu }{K}^{+}$ Searches
• Scalar Leptoquarks, Baryon Number Violation and Pati-Salam Symmetry
• Heavier $W$ boson, dark matter and gravitational waves from strings in an $SO(10)$ axion model
• A Predictive $SO(10)$ Model
• SO(10): a Case for Hadron Colliders
• $SU(5)$ grand unification and $W$-boson mass
• A Parameter Space Exploration of the Minimal SU(5) Unification
• Viable quark-lepton Yukawa ratios and nucleon decay predictions in $SU(5)$ GUTs with type-II seesaw
• Prospects for the detection of the Diffuse Supernova Neutrino Background with the experiments SK-Gd and JUNO
• Lepton Flavour Violation in minimal grand-unified type II seesaw models
• Rescattering effects in nucleon-to-meson form factors and application to tau-lepton-induced proton decay
• Nucleon decay in a minimal non-SUSY GUT with predicted quark-lepton Yukawa ratios
• Axion model with the $\mathrm{SU}(6)$ unification
• Proton decay
• Combined Pre-Supernova Alert System with Kamland and Super-Kamiokande
• Quark-lepton Yukawa ratios and nucleon decay in SU(5) GUTs with type-III seesaw
• Fully Testable Axion Dark Matter within a Minimal $SU(5)$ GUT
• Neutron Tagging following Atmospheric Neutrino Events in a Water Cherenkov Detector
• Quantum nature of the minimal potentially realistic $\mathrm{SO}(10)$ Higgs model
• Nuclear deexcitation simulator for neutrino interactions and nucleon decays of ${}^{12}\text{C}$ and ${}^{16}\text{O}$ based on TALYS
• Detection techniques and investigation of different neutrino experiments
• Nonholomorphic $A_4$ modular invariance for fermion masses and mixing in SU(5) GUT
• W boson mass anomaly and grand unification
• On the cosmology and terrestrial signals of sexaquark dark matter
• $W$ Boson Mass and Grand Unification via the Type-$\mathrm{I}\mathrm{I}$ Seesaw-like Mechanism
• Flavor physics in SU(5) GUT with scalar fields in the 45 representation
• Statistical significances and projections for proton decay experiments
• Measurement of neutron production in atmospheric neutrino interactions at Super-Kamiokande
• Baryon Number Violation: From Nuclear Matrix Elements to BSM Physics
• Gauge coupling unification and proton decay via 45 Higgs boson in SU(5) GUT
• Search for baryon number violation in top quark production and decay using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Unification of the four forces in the Spin(11,1) geometric algebra
• Insights on the Cosmic Origin of Matter from Proton Stability
• High-quality grand unified theories with three generations
• Nucleon Decays into Light New Particles in Neutrino Detectors
• Minimal Nambu-Goldstone Higgs Model in Supersymmetric SU(5) Revisited
• Laser-induced proton decay
• Search for baryon and lepton number violating decays of ${\Xi }^0$ hyperons
• A New Model of Intranuclear Neutron-Antineutron Transformations in ${}_8^{16}$O
• More on Fake GUT
• Baryon number non-conservation as Peccei-Quinn mechanism
• Further study of the maximally symmetry breaking patterns in an $\mathrm{SU}(8)$ theory
• Semi-leptonic three-body proton decay modes from light-cone sum rules
• Invisible neutron decay and light BSM particles
• Phenomenology of Dirac neutrino EFTs up to dimension six
• Minimal dark matter in $SU(5)$ grand unification
• The Neutrinoless Double Beta Decay in the Colored Zee-Babu Model
• A novel viewpoint of Proton Decay
• Status and Perspectives of Neutrino Physics
• First Gadolinium Loading to Super-Kamiokande
• Exploring flavour space of an economical SU(5) GUT in future proton decay measurements
• Proton Decay and Gauge Coupling Unification in an Extended SU(5) GUT with 45-Dimensional Higgs
• TeV Window to Grand Unification: Higgs's Light Color Triplet Partner
• One-loop proton decay from Peccei-Quinn symmetry
• Spontaneous CP Violation and Flavor Changing Neutral Currents in Minimal SO(10)
• Fermion masses and mixing in SO(10) GUT with a universal two-zero texture
• A Generic Analysis of Nucleon Decay Branching Fractions in Flipped SU(5) Grand Unification
• Grand Unified Origin of Enhanced Scalar Couplings: Connecting Radiative Electroweak Symmetry Breaking to SO(10) Dynamics
• Neutron multiplicity measurement in muon capture on oxygen nuclei in the Gd-loaded Super-Kamiokande detector
• Five dimensional $SU(5)\times U(1{)}_{\mathrm{PQ}}$ grand unification