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Peer-reviewedarXiv licencePhys.Rev.D

Search for proton decay into a single charged antilepton and a massless invisible particle using the full pure water data set of Super-Kamiokande

  • Y.M Liu
  • K Terada
  • K Abe
  • Y Asaoka
  • M Harada
  • Y Hayato
  • K Hiraide
  • T.H Hung
  • K Ieki
  • M Ikeda
  • J Kameda
  • Y Kataoka
234 more authors
  • S Mine
  • M Miura
  • S Moriyama
  • K Nakagiri
  • M Nakahata
  • S Nakayama
  • Y Noguchi
  • G Pronost
  • K Sato
  • H Sekiya
  • R Shinoda
  • M Shiozawa
  • Y Suzuki
  • A Takeda
  • Y Takemoto
  • H Tanaka
  • S Chen
  • Y Itow
  • T Kajita
  • R Nishijima
  • K Okumura
  • T Tashiro
  • T Tomiya
  • X Wang
  • F.J. de Garay Arcones
  • P Fernandez
  • L Labarga
  • D Samudio
  • C Yanagisawa
  • B Jargowsky
  • E Kearns
  • J Mirabito
  • L Wan
  • T Wester
  • B.W Pointon
  • J Bian
  • B Cortez
  • N.J Griskevich
  • Y Jiang
  • M.B Smy
  • H.W Sobel
  • V Takhistov
  • J Hill
  • B.D Xu
  • D Jung
  • D.H Moon
  • R.G Park
  • B.S Yang

60 listed; 246 in total.

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Abstract

A search for proton decay via p→ l++X, where l+ is a positively charged lepton and X is an invisible, massless, neutral particle, was performed using a 401~kton·years exposure representing the entire pure water phase of Super-Kamiokande. No significant indication of a proton decay was observed beyond the expected atmospheric neutrino background. Lower limits on the partial lifetime of the proton were set to at 1.72×1033 years for p→ e++X and 0.61×1033 years for p→ μ++X at the 90% confidence level. These results improve on previous limits by factors of 2 and 1.5, respectively.

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Cite

BibTeXRIS
BibTeX
@article{liu2026search,
  title = {{Search for proton decay into a single charged antilepton and a massless invisible particle using the full pure water data set of Super-Kamiokande}},
  author = {Y.M Liu and K Terada and K Abe and Y Asaoka and M Harada and Y Hayato and K Hiraide and T.H Hung and K Ieki and M Ikeda and J Kameda and Y Kataoka and S Mine and M Miura and S Moriyama and K Nakagiri and M Nakahata and S Nakayama and Y Noguchi and G Pronost and K Sato and H Sekiya and R Shinoda and M Shiozawa and Y Suzuki and A Takeda and Y Takemoto and H Tanaka and S Chen and Y Itow and T Kajita and R Nishijima and K Okumura and T Tashiro and T Tomiya and X Wang and F.J. de Garay Arcones and P Fernandez and L Labarga and D Samudio and C Yanagisawa and B Jargowsky and E Kearns and J Mirabito and L Wan and T Wester and B.W Pointon and J Bian and B Cortez and N.J Griskevich and Y Jiang and M.B Smy and H.W Sobel and V Takhistov and J Hill and B.D Xu and D Jung and D.H Moon and R.G Park and B.S Yang},
  journal = {Phys.Rev.D},
  year = {2026},
  month = aug,
  doi = {10.1103/rsr5-d3x2},
  eprint = {2608.30361},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05743887v1},
}
RIS
TY  - JOUR
TI  - Search for proton decay into a single charged antilepton and a massless invisible particle using the full pure water data set of Super-Kamiokande
AU  - Y.M Liu
AU  - K Terada
AU  - K Abe
AU  - Y Asaoka
AU  - M Harada
AU  - Y Hayato
AU  - K Hiraide
AU  - T.H Hung
AU  - K Ieki
AU  - M Ikeda
AU  - J Kameda
AU  - Y Kataoka
AU  - S Mine
AU  - M Miura
AU  - S Moriyama
AU  - K Nakagiri
AU  - M Nakahata
AU  - S Nakayama
AU  - Y Noguchi
AU  - G Pronost
AU  - K Sato
AU  - H Sekiya
AU  - R Shinoda
AU  - M Shiozawa
AU  - Y Suzuki
AU  - A Takeda
AU  - Y Takemoto
AU  - H Tanaka
AU  - S Chen
AU  - Y Itow
AU  - T Kajita
AU  - R Nishijima
AU  - K Okumura
AU  - T Tashiro
AU  - T Tomiya
AU  - X Wang
AU  - F.J. de Garay Arcones
AU  - P Fernandez
AU  - L Labarga
AU  - D Samudio
AU  - C Yanagisawa
AU  - B Jargowsky
AU  - E Kearns
AU  - J Mirabito
AU  - L Wan
AU  - T Wester
AU  - B.W Pointon
AU  - J Bian
AU  - B Cortez
AU  - N.J Griskevich
AU  - Y Jiang
AU  - M.B Smy
AU  - H.W Sobel
AU  - V Takhistov
AU  - J Hill
AU  - B.D Xu
AU  - D Jung
AU  - D.H Moon
AU  - R.G Park
AU  - B.S Yang
PY  - 2026
DA  - 2026/08/31
JO  - Phys.Rev.D
DO  - 10.1103/rsr5-d3x2
UR  - https://hal.science/hal-05743887v1
AB  - A search for proton decay via p→ l^++X, where l^+ is a positively charged lepton and X is an invisible, massless, neutral particle, was performed using a 401~kton·years exposure representing the entire pure water phase of Super-Kamiokande. No significant indication of a proton decay was observed beyond the expected atmospheric neutrino background. Lower limits on the partial lifetime of the proton were set to at 1.72×10^33 years for p→ e^++X and 0.61×10^33 years for p→ μ^++X at the 90% confidence level. These results improve on previous limits by factors of 2 and 1.5, respectively.
ER  -