Submitted manuscript, 538 KB, PDF document
Final published version, 540 KB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Search for invisible modes of nucleon decay in water with the SNO+ detector
AU - SNO+ Collaboration
AU - :,
AU - Andringa, S.
AU - Arushanova, E.
AU - Asahi, S.
AU - Askins, M.
AU - Auty, D. J.
AU - Back, A. R.
AU - Barnard, Z.
AU - Barros, N.
AU - Bartlett, D.
AU - Barão, F.
AU - Bayes, R.
AU - Beier, E. W.
AU - Bialek, A.
AU - Biller, S. D.
AU - Blucher, E.
AU - Bonventre, R.
AU - Boulay, M.
AU - Braid, D.
AU - Caden, E.
AU - Callaghan, E. J.
AU - Caravaca, J.
AU - Carvalho, J.
AU - Cavalli, L.
AU - Chauhan, D.
AU - Chkvorets, O.
AU - Clark, K. J.
AU - Cleveland, B.
AU - Connors, C.
AU - Coulter, I. T.
AU - Cressy, D.
AU - Dai, X.
AU - Darrach, C.
AU - Davis-Purcell, B.
AU - Depatie, M. M.
AU - Descamps, F.
AU - Lodovico, F. Di
AU - Duhaime, N.
AU - Duncan, F.
AU - Dunger, J.
AU - Falk, E.
AU - Fatemighomi, N.
AU - Fischer, V.
AU - Fletcher, E.
AU - Kormos, L. L.
AU - O'Keeffe, H. M.
AU - Parnell, M. J.
N1 - 13 pages, 6 figures
PY - 2019/2/1
Y1 - 2019/2/1
N2 - 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.
AB - 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.
KW - hep-ex
KW - physics.ins-det
U2 - 10.1103/PhysRevD.99.032008
DO - 10.1103/PhysRevD.99.032008
M3 - Journal article
VL - 99
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 3
M1 - 032008
ER -