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  • 1812.05552v1

    Submitted manuscript, 538 KB, PDF document

  • PhysRevD.99.032008

    Final published version, 540 KB, PDF document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License


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

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • SNO+ Collaboration
Article number032008
<mark>Journal publication date</mark>1/02/2019
<mark>Journal</mark>Physical Review D
Issue number3
Number of pages13
Publication StatusPublished
<mark>Original language</mark>English


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 de-excite, often emitting detectable gamma rays. A search for such gamma rays yields limits of $2.5 \times 10^{29}$ y at 90% Bayesian credibility level (with a prior uniform in rate) for the partial lifetime of the neutron, and $3.6 \times 10^{29}$ 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 $1.3\times 10^{28}$ y for $nn$, $2.6\times 10^{28}$ y for $pn$ and $4.7\times 10^{28}$ y for $pp$, an improvement over existing limits by close to three orders of magnitude for the latter two.

Bibliographic note

13 pages, 6 figures