Search for proton decay via p →e+η and p →μ+η with a 0.37 Mton-year exposure of Super-Kamiokande

(The Super-Kamiokande Collaboration)

doi:10.1103/PhysRevD.110.112011

Search for proton decay via p →e+η and p →μ+η with a 0.37 Mton-year exposure of Super-Kamiokande

(The Super-Kamiokande Collaboration)

University of Tokyo
Long Beach VA and University of California
International Laboratory for Astrophysics
Universidad Autónoma de Madrid
British Columbia Institute of Technology
TRIUMF
Boston University
High Energy Accelerator Research Organization (KEK)
California State University, Dominguez Hills
Chonnam National University
Duke University
Ip Paris
Gifu University
Gwangju Institute of Science and Technology
University of Glasgow
University of Hawaii
Institute for Basic Science (IBS)
ICISE
Imperial College London
Politecnico di Bari
University of Naples Federico II
University of Padova
University of Rome
Keio University
King's College London
Kobe University
Kyoto University
University of Liverpool
University of Minnesota
Miyagi University of Education
Nagoya University
National Centre for Nuclear Research (NCBJ)
Stony Brook University
York College/The City University of New York
Okayama University
Osaka Electro-Communication University
University of Oxford
CCLRC Rutherford Appleton Laboratory
Seoul National University
The University of Sheffield
Shizuoka University of Welfare
University of Silesia
Sungkyunkwan University
Tohoku University
Tokai University
Tokyo Institute of Technology
Tokyo University of Science
University of Toyama
University of Toronto
University of Victoria
Tsinghua University
University of Warsaw
University of Warwick
University of Winnipeg
Yokohama National University

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373 Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear η interaction cross section, resulting in a factor of 2 reduction in uncertainties from this source and ∼10% increase in signal efficiency. No significant data excess was found above the expected number of atmospheric neutrino background events resulting in no indication of proton decay into either mode. Lower limits on the proton partial lifetime of 1.4×1034 years for p→e+η and 7.3×1033 years for p→μ+η at the 90% CL were set. These limits are around 1.5 times longer than our previous study and are the most stringent to date.

Original language	English
Article number	112011
Journal	Physical Review D
Volume	110
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.110.112011
Publication status	Published - 1 Dec 2024

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10.1103/PhysRevD.110.112011

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@article{ae91e3262e174620a14f35b06a9a255e,

title = "Search for proton decay via p →e+η and p →μ+η with a 0.37 Mton-year exposure of Super-Kamiokande",

abstract = "A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373 Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear η interaction cross section, resulting in a factor of 2 reduction in uncertainties from this source and ∼10\% increase in signal efficiency. No significant data excess was found above the expected number of atmospheric neutrino background events resulting in no indication of proton decay into either mode. Lower limits on the proton partial lifetime of 1.4×1034 years for p→e+η and 7.3×1033 years for p→μ+η at the 90\% CL were set. These limits are around 1.5 times longer than our previous study and are the most stringent to date.",

author = "\{(The Super-Kamiokande Collaboration)\} and N. Taniuchi and K. Abe and S. Abe and Y. Asaoka and C. Bronner and M. Harada and Y. Hayato and K. Hiraide and K. Hosokawa and K. Ieki and M. Ikeda and J. Kameda and Y. Kanemura and R. Kaneshima and Y. Kashiwagi and Y. Kataoka and S. Miki and S. Mine and M. Miura and S. Moriyama and M. Nakahata and S. Nakayama and Y. Noguchi and G. Pronost and K. Okamoto and K. Sato and H. Sekiya and H. Shiba and K. Shimizu and M. Shiozawa and Y. Sonoda and Y. Suzuki and A. Takeda and Y. Takemoto and A. Takenaka and H. Tanaka and S. Watanabe and T. Yano and T. Kajita and K. Okumura and T. Tashiro and T. Tomiya and X. Wang and S. Yoshida and Megias, \{G. D.\} and O. Drapier and P. Paganini and R. Rogly and M. Gonin and B. Quilain",

note = "Publisher Copyright: {\textcopyright} 2024 authors. Published by the American Physical Society.",

year = "2024",

month = dec,

day = "1",

doi = "10.1103/PhysRevD.110.112011",

language = "English",

volume = "110",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

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TY - JOUR

T1 - Search for proton decay via p →e+η and p →μ+η with a 0.37 Mton-year exposure of Super-Kamiokande

AU - (The Super-Kamiokande Collaboration)

AU - Taniuchi, N.

AU - Abe, K.

AU - Abe, S.

AU - Asaoka, Y.

AU - Bronner, C.

AU - Harada, M.

AU - Hayato, Y.

AU - Hiraide, K.

AU - Hosokawa, K.

AU - Ieki, K.

AU - Ikeda, M.

AU - Kameda, J.

AU - Kanemura, Y.

AU - Kaneshima, R.

AU - Kashiwagi, Y.

AU - Kataoka, Y.

AU - Miki, S.

AU - Mine, S.

AU - Miura, M.

AU - Moriyama, S.

AU - Nakahata, M.

AU - Nakayama, S.

AU - Noguchi, Y.

AU - Pronost, G.

AU - Okamoto, K.

AU - Sato, K.

AU - Sekiya, H.

AU - Shiba, H.

AU - Shimizu, K.

AU - Shiozawa, M.

AU - Sonoda, Y.

AU - Suzuki, Y.

AU - Takeda, A.

AU - Takemoto, Y.

AU - Takenaka, A.

AU - Tanaka, H.

AU - Watanabe, S.

AU - Yano, T.

AU - Kajita, T.

AU - Okumura, K.

AU - Tashiro, T.

AU - Tomiya, T.

AU - Wang, X.

AU - Yoshida, S.

AU - Megias, G. D.

AU - Drapier, O.

AU - Paganini, P.

AU - Rogly, R.

AU - Gonin, M.

AU - Quilain, B.

PY - 2024/12/1

Y1 - 2024/12/1

N2 - A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373 Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear η interaction cross section, resulting in a factor of 2 reduction in uncertainties from this source and ∼10% increase in signal efficiency. No significant data excess was found above the expected number of atmospheric neutrino background events resulting in no indication of proton decay into either mode. Lower limits on the proton partial lifetime of 1.4×1034 years for p→e+η and 7.3×1033 years for p→μ+η at the 90% CL were set. These limits are around 1.5 times longer than our previous study and are the most stringent to date.

AB - A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373 Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear η interaction cross section, resulting in a factor of 2 reduction in uncertainties from this source and ∼10% increase in signal efficiency. No significant data excess was found above the expected number of atmospheric neutrino background events resulting in no indication of proton decay into either mode. Lower limits on the proton partial lifetime of 1.4×1034 years for p→e+η and 7.3×1033 years for p→μ+η at the 90% CL were set. These limits are around 1.5 times longer than our previous study and are the most stringent to date.

UR - https://www.scopus.com/pages/publications/85215013238

U2 - 10.1103/PhysRevD.110.112011

DO - 10.1103/PhysRevD.110.112011

M3 - Article

AN - SCOPUS:85215013238

SN - 2470-0010

VL - 110

JO - Physical Review D

JF - Physical Review D

IS - 11

M1 - 112011

ER -

Search for proton decay via p →e+η and p →μ+η with a 0.37 Mton-year exposure of Super-Kamiokande

Abstract

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