Search for neutron-antineutron oscillations at the Sudbury Neutrino Observatory
Name
PhysRevD.96.092005.pdf
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Author(s)
Aharmim, B.
Ahmed, S. N.
Anthony, A. E.
Barros, N.
Beier, E. W.
Bellerive, A.
Beltran, B.
Bergevin, M.
Biller, S. D.
Boudjemline, K.
Date Issued
November 2017
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aharmim, B. et al. "Search for neutron-antineutron oscillations at the Sudbury Neutrino Observatory" Physical Review D 96, 9 (November 2017): 092005 © 2017 American Physical Society
Version
Final published version
Abstract
Tests on B-L symmetry breaking models are important probes to search for new physics. One proposed model with Δ(B-L)=2 involves the oscillations of a neutron to an antineutron. In this paper, a new limit on this process is derived for the data acquired from all three operational phases of the Sudbury Neutrino Observatory experiment. The search concentrated on oscillations occurring within the deuteron, and 23 events were observed against a background expectation of 30.5 events. These translated to a lower limit on the nuclear lifetime of 1.48×10³¹ yr at 90% C.L. when no restriction was placed on the signal likelihood space (unbounded). Alternatively, a lower limit on the nuclear lifetime was found to be 1.18×10³¹ yr at 90% C.L. when the signal was forced into a positive likelihood space (bounded). Values for the free oscillation time derived from various models are also provided in this article. This is the first search for neutron-antineutron oscillation with the deuteron as a target.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.96.092005
