Search for proton decay via p-->e+pi0 and p-->micro+pi0 in a large water Cherenkov detector.

  title={Search for proton decay via p-->e+pi0 and p-->micro+pi0 in a large water Cherenkov detector.},
  author={H. Nishino and S. Clark and K. Abe and Y. Hayato and T. Iida and M. Ikeda and J. Kameda and K. Kobayashi and Y. Koshio and M. Miura and S. Moriyama and M. Nakahata and S. Nakayama and Y. Obayashi and H. Ogawa and H. Sekiya and M. Shiozawa and Y. Suzuki and A. Takeda and Y. Takenaga and Y. Takeuchi and K. Ueno and K. Ueshima and Hiroshi Watanabe and S. Yamada and S. Hazama and I. Higuchi and C. Ishihara and T. Kajita and K. Kaneyuki and G. Mitsuka and K. Okumura and N. Tanimoto and M. Vagins and F. Dufour and E. Kearns and M. Litos and J. Raaf and J. Stone and L. Sulak and W. Wang and M. Goldhaber and S. Dazeley and R. Svoboda and K. Bays and D. Casper and J. P. Cravens and W. Kropp and S. Mine and C. Regis and M. Smy and H. Sobel and K. Ganezer and J. Hill and W. Keig and J. E. Jang and J. Kim and I. Lim and M. Fechner and K. Scholberg and C. Walter and R. Wendell and S. Tasaka and J. Learned and S. Matsuno and Y. Watanabe and T. Hasegawa and T. Ishida and T. Ishii and Tooru Kobayashi and T. Nakadaira and K. Nakamura and K. Nishikawa and Y. Oyama and K. Sakashita and T. Sekiguchi and T. Tsukamoto and A. Suzuki and A. Minamino and T. Nakaya and M. Yokoyama and Y. Fukuda and Y. Itow and T. Tanaka and C. Jung and G. L{\'o}pez and C. Mcgrew and R. Terri and C. Yanagisawa and N. Tamura and Y. Idehara and M. Sakuda and Y. Kuno and Minoru Yoshida and S. Kim and B. Yang and T. Ishizuka and H. Okazawa and Y. Choi and H. Seo and Y. Furuse and K. Nishijima and Y. Yokosawa and M. Koshiba and Y. Totsuka and S. Chen and Y. Heng and Z. Yang and H. Zhang and D. Kiełczewska and E. Thrane and R. J. Wilkes},
  journal={Physical review letters},
  volume={102 14},
We have searched for proton decays via p-->e;{+}pi;{0} and p-->micro;{+}pi;{0} using data from a 91.7 kt.yr exposure of Super-Kamiokande-I and a 49.2 kt.yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of 0.3 events for each decay mode. From these results, we set lower limits on the partial lifetime of 8.2 x 10;{33} and 6.6 x 10;{33} years at 90% confidence level for p-->e;{+}pi;{0} and p-->micro;{+}pi;{0} modes… Expand

Figures, Tables, and Topics from this paper

Search for R-parity violating decays of a top squark in proton–proton collisions at s=8 TeV
The results of a search for a supersymmetric partner of the top quark (top squark), pair-produced in proton–proton collisions at √s = 8 TeV, are presented. The search, which focuses on R-parityExpand
The T2K Experiment
The T2K experiment is a long-baseline neutrino oscillation experiment. Its main goal is to measure the last unknown lepton sector mixing angle {\theta}_{13} by observing {\nu}_e appearance in aExpand
Proton annihilation at hadron colliders and Kamioka: High energy versus high luminosity
We examine models and prospects for proton annihilation to dileptons, a process which violates baryon and lepton number each by two. We determine that currently Super-Kamiokande would place the mostExpand
Fast proton decay
We consider proton decay in the testable flipped SU(5) x U(1)x models with TeV-scale vector-like particles which can be realized in free fermionic string constructions and F-theory model building. WeExpand
Search for Baryon and Lepton Number Violation in $J/\psi\to\Lambda_c^+e^-+c.c.$
Using $1.31\times10^9$ $J/\psi$ events collected by the BESIII detector at the Beijing Electron Positron Collider, we search for the process $J/\psi\to\Lambda_c^+e^-+c.c.$ for the first time. In thisExpand
Search for baryon number violation in top-quark decays
A search for baryon number violation (BNV) in top-quark decays is performed using pp collisions produced by the LHC at sqrt(s) = 8 TeV. The top-quark decay considered in this search results in oneExpand
Improving the modelling of the associated production of W-bosons and jets in the ATLAS detector Verbesserung der Modellierung der assoziierten Produktion von W-Bosonen und Jets im ATLAS Detektor
  • 2018
Supersymmetry is a theoretical extension of the Standard Model of particle physics and provides a framework that can resolve most of the limitations that arise within the Standard Model, as forExpand
Nucleon decay searches with large liquid Argon TPC detectors at shallow depths: atmospheric neutrinos and cosmogenic backgrounds
Grand Unification of the strong, weak and electromagnetic interactions into a single unified gauge group is an extremely appealing idea which has been vigorously pursued theoretically andExpand
Measurement of Hadronic Event Shapes and Jet Substructure in Proton-Proton Collisions at 7.0 TeV Center-of-Mass Energy with the ATLAS Detector at the Large Hadron Collider
This thesis presents the first measurement of 6 hadronic event shapes in proton-proton collisions at a center-of-mass energy of {radical}s = 7 TeV using the ATLAS detector at the Large HadronExpand
Search for Nucleon Decays With EXO-200
A search for instability of nucleons bound in ^(136)Xe nuclei is reported with 223 kg·yr exposure of ^(136)Xe in the EXO-200 experiment. Lifetime limits of 3.3×10^(23) and 1.9×10^(23)  yr areExpand


  • Phys. Proc. Suppl. 112, 161
  • 2002
  • Rev. D75, 043006
  • 2007
  • Phys. Rev
  • 2005
  • Phys. B Proc. Suppl. 112, 171
  • 2002
  • Lett. B550, 99
  • 2002
  • Lett. B453, 1
  • 1999
  • Phys. Rev. Lett
  • 1998
  • Rev. D51, 229
  • 1995
GEANT Detector Description and Simulation Tool
  • Sci. 36, 14
  • 1989