Abstract
A search for the dinucleon decay has been performed using data from Super-Kamiokande-I. This decay provides a sensitive probe of the -parity-violating parameter . A boosted decision tree analysis found no signal candidates in the data. The expected background was atmospheric neutrino induced events and the estimated signal detection efficiency was . A lower limit of has been placed on the partial lifetime of the decay at 90% C.L. A corresponding upper limit of has been placed on the parameter .
- Received 10 October 2013
DOI:https://doi.org/10.1103/PhysRevLett.112.131803
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