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

Research output: Contribution to journalResearch articleContributedpeer-review


  • (SNO+Collaboration) - (Author)
  • Chair of Nuclear Physics
  • Chair of Inorganic Molecular Chemistry
  • Queen's University Kingston
  • Laboratório de Instrumentação e Física Experimental de Partículas
  • University of California at Berkeley
  • Lawrence Berkeley National Laboratory
  • University of Alberta
  • University of Pennsylvania
  • University of Lisbon
  • Laurentian University
  • University of Sussex
  • Creighton Mine #9
  • University of Oxford
  • The University of Chicago
  • University of Liverpool (UOL)
  • King's College London (KCL)
  • Boston University
  • Universidad Nacional Autónoma de México
  • Hungarian Academy of Sciences


This paper reports results from a search for single and multinucleon disappearance from the O16 nucleus in water within the SNO+ detector using all of the available data. These so-called "invisible"decays do not directly deposit energy within the detector but are instead detected through their subsequent nuclear deexcitation and gamma-ray emission. New limits are given for the partial lifetimes: τ(n→inv)>9.0×1029 years, τ(p→inv)>9.6×1029 years, τ(nn→inv)>1.5×1028 years, τ(np→inv)>6.0×1028 years, and τ(pp→inv)>1.1×1029 years at 90% Bayesian credibility level (with a prior uniform in rate). All but the (nn→inv) results improve on existing limits by a factor of about 3.


Original languageEnglish
Article number112012
JournalPhysical review d
Issue number11
Publication statusPublished - 27 Jun 2022

External IDs

WOS 000822545100007
ORCID /0000-0001-7323-7816/work/142257480


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