Search for Proton Decay via<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>μ</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>π</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>in a Large Water Cherenkov Detector

2009129 citationsJournal Articlegreen Open Access

Authors

H. Nishino · The University of Tokyo

Steven Vincent Clark · Boston University

K. Abe · The University of Tokyo

Y. Hayato · The University of Tokyo

T. Iida · The University of Tokyo

M. Ikeda · The University of Tokyo

J. Kameda · The University of Tokyo

Abstract

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, respectively.

Topics & Keywords

Particle physics theoretical and experimental studies Neutrino Physics Research Dark Matter and Cosmic Phenomena

Publication Details

Published in: Physical Review Letters

Volume 102, Issue 14, pp. 141801-141801

DOI: 10.1103/physrevlett.102.141801

Field-Weighted Citation Impact: 28.56

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Publication Details