Speaker
Dr.
Artur Shaikhiev
(INR RAS)
Description
Evidence of the $K^+\to\mu^+\nu\bar\nu\nu$ decay was searched for using E949 (Brookhaven National Laboratory, USA) experimental data with an exposure of $1.70\times 10^{12}$ stopped kaons. The data sample is dominated by the background process $K^+\to\mu^+\nu_\mu\gamma$. An upper limit on the decay rate $\Gamma(K^+\to\mu^+\nu\bar\nu\nu) < 2.4\times 10^{−6}\Gamma(K^+\to$ all) 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 $\mu^+$ spectrum.
Primary author
Dr.
Artur Shaikhiev
(INR RAS)
