Abe, K, Bronner, C, Hayato, Y et al. (196 more authors) (2021) Neutron-antineutron oscillation search using a 0.37 megaton-years exposure of Super-Kamiokande. Physical Review D, 103 (1). 012008. ISSN 2470-0010
Abstract
As a baryon number violating process with ΔB ¼ 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 16O nuclei of 3.6 × 1032 years and on the neutron-antineutron oscillation time of τn→n¯ > 4.7 × 108 s at 90% C.L.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2021 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. |
Keywords: | hep-ex; hep-ex |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 17 May 2021 09:45 |
Last Modified: | 17 May 2021 09:45 |
Status: | Published |
Publisher: | American Physical Society (APS) |
Refereed: | Yes |
Identification Number: | 10.1103/physrevd.103.012008 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:174134 |