Back, A R, Clark, K J, Falk, E, Hartnell, J, Lefeuvre, G M, Leming, E J, Mlejnek, M, Mottram, M J, Nirkko, M, Peeters, S J M, Rigan, M, Sinclair, J R, Stringer, M I, Waterfield, J, White, R F, The SNO+ Collaboration, and others, (2019) Search for invisible modes of nucleon decay in water with the SNO+ detector. Physical Review D, 99 (3). 032008 1-13. ISSN 2470-0010
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Abstract
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.
Item Type: | Article |
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Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Research Centres and Groups: | Experimental Particle Physics Research Group |
Subjects: | Q Science Q Science > QC Physics |
Depositing User: | Alice Jackson |
Date Deposited: | 28 Jan 2019 13:06 |
Last Modified: | 27 Feb 2019 14:11 |
URI: | http://srodev.sussex.ac.uk/id/eprint/81456 |
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📧 Request an updateProject Name | Sussex Project Number | Funder | Funder Ref |
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Optical Calibration Development for SNO+ | G0753 | STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL | ST/J001007/1 |
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 |
Sussex EPP Rolling Grant 2009 | G0332 | STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL | ST/H000887/2 |
Marie Curie Actions Intra-European Fellowship (IEF) | Unset | Unset | FP7-PEOPLE-2009-IEF |