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Search for invisible modes of nucleon decay in water with the SNO+ detector

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journal contribution
posted on 2023-06-12, 08:58 authored by A R Back, K J Clark, Elisabeth FalkElisabeth Falk, Jeff HartnellJeff Hartnell, G M Lefeuvre, E J Leming, M Mlejnek, M J Mottram, Martti Nirkko, Simon PeetersSimon Peeters, Michal RiganMichal Rigan, J R Sinclair, M I Stringer, J Waterfield, R F White, The SNO+ Collaboration, others
This paper reports results from a search for nucleon decay through invisible modes, where no visible energy is directly deposited during the decay itself, during the initial water phase of SNO+. However, such decays within the oxygen nucleus would produce an excited daughter that would subsequently deexcite, often emitting detectable gamma rays. A search for such gamma rays yields limits of 2.5×1029??y at 90% Bayesian credibility level (with a prior uniform in rate) for the partial lifetime of the neutron, and 3.6×1029??y for the partial lifetime of the proton, the latter a 70% improvement on the previous limit from SNO. We also present partial lifetime limits for invisible dinucleon modes of 1.3×1028??y for nn, 2.6×1028??y for pn and 4.7×1028??y for pp, an improvement over existing limits by close to 3 orders of magnitude for the latter two.

Funding

Optical Calibration Development for SNO+; G0753; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/J001007/1

Sussex EPP Rolling Grant 2009; G0332; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/H000887/2

Sussex Experimental Particle Physics 2015 Consolidated Grant; G1763; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/N000307/1

Consolidated Grant; G0927; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/K001329/1

Marie Curie Actions Intra-European Fellowship (IEF); FP7-PEOPLE-2009-IEF

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

2470-0010

Publisher

American Physical Society

Issue

3

Volume

99

Page range

032008 1-13

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Experimental Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-01-28

First Open Access (FOA) Date

2019-01-28

First Compliant Deposit (FCD) Date

2019-01-25

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