AI Article Synopsis
- A search was conducted for the decay process pp → K+ K+ using data from the Super-Kamiokande-I experiment, which gathered 91.6 kton·yr of information.
- The analysis did not find any signal candidates, indicating no evidence for the decay, while estimating a background of approximately 0.28 atmospheric neutrino events.
- A lower limit on the partial lifetime of the decay O16 → C14K+ K+ was established at 1.7×10(32) years with 90% confidence, alongside an upper limit of 7.8×10(-9) for the R-parity-violating parameter λ112''.
Article Abstract
A search for the dinucleon decay pp → K+ K+ has been performed using 91.6 kton·yr data from Super-Kamiokande-I. This decay provides a sensitive probe of the R-parity-violating parameter λ112''. A boosted decision tree analysis found no signal candidates in the data. The expected background was 0.28±0.19 atmospheric neutrino induced events and the estimated signal detection efficiency was 12.6%±3.2%. A lower limit of 1.7×10(32) years has been placed on the partial lifetime of the decay O16 → C14K+ K+ at 90% C.L. A corresponding upper limit of 7.8×10(-9) has been placed on the parameter λ112''.
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| http://dx.doi.org/10.1103/PhysRevLett.112.131803 | DOI Listing |
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