Search for proton decay via <i>p</i> → <i>e</i><SUP>+</SUP>π<SUP>0</SUP> and <i>p</i> → μ<SUP>+</SUP>π<SUP>0</SUP> with an enlarged fiducial volume in Super-Kamiokande I-IV



Takenaka, A, Abe, K, Bronner, C, Hayato, Y, Ikeda, M, Imaizumi, S, Ito, H, Kameda, J, Kataoka, Y, Kato, Y
et al (show 204 more authors) (2020) Search for proton decay via <i>p</i> → <i>e</i><SUP>+</SUP>π<SUP>0</SUP> and <i>p</i> → μ<SUP>+</SUP>π<SUP>0</SUP> with an enlarged fiducial volume in Super-Kamiokande I-IV. PHYSICAL REVIEW D, 102 (11).

Access the full-text of this item by clicking on the Open Access link.

Abstract

We have searched for proton decay via p→e+π0 and p→μ+π0 modes with the enlarged fiducial volume data of Super-Kamiokande from April 1996 to May 2018, which corresponds to 450 kton·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·years of data, including 78 kton·years of additional fiducial volume data, has been newly analyzed. No candidates have been found for p→e+π0 and one candidate remains for p→μ+π0 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: τ/B(p→e+π0)>2.4×1034 years and τ/B(p→μ+π0)>1.6×1034 years at 90% confidence level.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 22 Jan 2021 11:07
Last Modified: 06 Oct 2023 20:11
DOI: 10.1103/PhysRevD.102.112011
Open Access URL: https://journals.aps.org/prd/abstract/10.1103/Phys...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3114516