Speaker
Dosbol Baigarashev
(Maratuly)
Description
The main goal of the NA62 experiment at CERN is to measure the probability of the ultra-rare $K^+$ → $π^+vv$ decay. The collected statistics for 2016-2018 years allow us to analyze other rare decays, in particular, $K^+→e^+vµ^+µ^-$. Since the inner bremsstrahlung (IB) for $K^+→e^+vµ^+µ^-$ decay is suppressed (0.03%), this decay is well suited for measuring form factors ($F_V$, $F_A$, and R). The chiral perturbative theory (ChPT) prediction of the decay probability $K^+→e^+vµ^+µ^-$ with a value of $1.12*10^{-8}$ is known. The previous experimental result is $(1.7 ± 0.5)*10^{-8}$.
We present the research methodology, the first results of signal selection, and the study of the background sources for the decay.
Primary author
Dosbol Baigarashev
(Maratuly)
