Jan 21, 2021
Neutron-antineutron oscillation search using a 0.37 megaton-years exposure of Super-Kamiokande
Physical Review D
- Volume
- 103
- Number
- 1
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/physrevd.103.012008
- Publisher
- American Physical Society (APS)
As a baryon number violating process with ΔB=2, neutron-antineutron oscillation (n→n¯) provides a unique test of baryon number conservation. We have performed a search for n→n¯ oscillation with bound neutrons in Super-Kamiokande, with the full dataset from its first four run periods, representing an exposure of 0.37 Mton-years. The search used a multivariate analysis trained on simulated n→n¯ events and atmospheric neutrino backgrounds and resulted in 11 candidate events with an expected background of 9.3 events. In the absence of statistically significant excess, we derived a lower limit on n¯ appearance lifetime in O16 nuclei of 3.6×1032 years and on the neutron-antineutron oscillation time of τn→n¯>4.7×108 s at 90% C.L.
- Link information
-
- DOI
- https://doi.org/10.1103/physrevd.103.012008
- URL
- https://link.aps.org/article/10.1103/PhysRevD.103.012008
- URL
- http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.103.012008/fulltext
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85100240197&origin=inward Open access
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85100240197&origin=inward
- ID information
-
- DOI : 10.1103/physrevd.103.012008
- ISSN : 2470-0010
- eISSN : 2470-0029
- SCOPUS ID : 85100240197