Abstract
Evidence of the decay was searched for using E949 (Brookhaven National Laboratory, USA) experimental data with an exposure of stopped kaons. The data sample is dominated by the background process . An upper limit on the decay rate at 90% confidence level was set assuming the standard model muon spectrum. The data are presented in such a way as to allow calculation of rates for any assumed spectrum.
- Received 29 June 2016
DOI:https://doi.org/10.1103/PhysRevD.94.032012
© 2016 American Physical Society