Papers

Peer-reviewed
Jan 21, 2021

Neutron-antineutron oscillation search using a 0.37 megaton-years exposure of Super-Kamiokande

Physical Review D
  • K. Abe
  • C. Bronner
  • Y. Hayato
  • M. Ikeda
  • S. Imaizumi
  • H. Ito
  • J. Kameda
  • Y. Kataoka
  • M. Miura
  • S. Moriyama
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  • H. Tanaka
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  • S. Han
  • T. Kajita
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  • J. Xia
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  • L. Wan
  • T. Wester
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  • V. Takhistov
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  • J. Hill
  • J. Y. Kim
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  • K. Scholberg
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  • S. El Hedri
  • A. Giampaolo
  • M. Gonin
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  • B. Quilain
  • T. Ishizuka
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  • J. S. Jang
  • J. G. Learned
  • L. H. V. Anthony
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  • M. Friend
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  • M. Jakkapu
  • K. Nakamura
  • Y. Oyama
  • K. Sakashita
  • T. Sekiguchi
  • T. Tsukamoto
  • Y. Nakano
  • T. Shiozawa
  • A. T. Suzuki
  • Y. Takeuchi
  • S. Yamamoto
  • A. Ali
  • Y. Ashida
  • J. Feng
  • S. Hirota
  • A. K. Ichikawa
  • T. Kikawa
  • M. Mori
  • T. Nakaya
  • R. A. Wendell
  • K. Yasutome
  • P. Fernandez
  • N. McCauley
  • P. Mehta
  • A. Pritchard
  • K. M. Tsui
  • Y. Fukuda
  • Y. Itow
  • H. Menjo
  • T. Niwa
  • K. Sato
  • M. Tsukada
  • P. Mijakowski
  • M. Posiadala-Zezula
  • C. K. Jung
  • C. Vilela
  • M. J. Wilking
  • C. Yanagisawa
  • M. Harada
  • K. Hagiwara
  • T. Horai
  • H. Ishino
  • S. Ito
  • Y. Koshio
  • W. Ma
  • N. Piplani
  • S. Sakai
  • Y. Kuno
  • G. Barr
  • D. Barrow
  • L. Cook
  • A. Goldsack
  • S. Samani
  • C. Simpson
  • D. Wark
  • F. Nova
  • T. Boschi
  • F. Di Lodovico
  • S. Molina Sedgwick
  • M. Taani
  • S. Zsoldos
  • J. Y. Yang
  • S. J. Jenkins
  • J. M. McElwee
  • M. D. Thiesse
  • L. F. Thompson
  • M. Malek
  • O. Stone
  • H. Okazawa
  • S. B. Kim
  • I. Yu
  • K. Nishijima
  • M. Koshiba
  • N. Ogawa
  • K. Iwamoto
  • M. Yokoyama
  • K. Martens
  • M. R. Vagins
  • M. Kuze
  • S. Izumiyama
  • M. Tanaka
  • T. Yoshida
  • M. Inomoto
  • M. Ishitsuka
  • R. Matsumoto
  • K. Ohta
  • M. Shinoki
  • J. F. Martin
  • H. A. Tanaka
  • T. Towstego
  • M. Hartz
  • A. Konaka
  • P. de Perio
  • N. W. Prouse
  • B. W. Pointon
  • S. Chen
  • B. D. Xu
  • B. Richards
  • B. Jamieson
  • J. Walker
  • A. Minamino
  • K. Okamoto
  • G. Pintaudi
  • R. Sasaki
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Volume
103
Number
1
Language
English
Publishing type
Research paper (scientific journal)
DOI
10.1103/physrevd.103.012008
Publisher
American Physical Society (APS)

As a baryon number violating process with ΔB=2, neutron-antineutron oscillation (n→n¯) provides a unique test of baryon number conservation. We have performed a search for n→n¯ oscillation with bound neutrons in Super-Kamiokande, with the full dataset from its first four run periods, representing an exposure of 0.37 Mton-years. The search used a multivariate analysis trained on simulated n→n¯ events and atmospheric neutrino backgrounds and resulted in 11 candidate events with an expected background of 9.3 events. In the absence of statistically significant excess, we derived a lower limit on n¯ appearance lifetime in O16 nuclei of 3.6×1032 years and on the neutron-antineutron oscillation time of τn→n¯>4.7×108 s at 90% C.L.

Link information
DOI
https://doi.org/10.1103/physrevd.103.012008
URL
https://link.aps.org/article/10.1103/PhysRevD.103.012008
URL
http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.103.012008/fulltext
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85100240197&origin=inward Open access
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85100240197&origin=inward
ID information
  • DOI : 10.1103/physrevd.103.012008
  • ISSN : 2470-0010
  • eISSN : 2470-0029
  • SCOPUS ID : 85100240197

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