EPJ Web of Conferences 191, 02014 (2018)
https://doi.org/10.1051/epjconf/201819102014

Study of K⁺ →π⁰e⁺ν_eγ decay with OKA setup

Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia

^* e-mail: polyarush@inr.ac

Published online: 31 October 2018

Abstract

Results of study of the K⁺ → π⁰e⁺νγ decay at OKA setup are presented. 16889 events of this decay have been observed. The branching ratio with cuts E^*_γ > 10 MeV, 0.6 < cos^Θ*_eγ < 0.9 is calculated $R=\frac{Br\left(k^{+}\to {\pi }^0{e}^{+}{v}_{e}y\right)}{Br\left(K^{+}\to {\pi }^0{e}^{+}{v}_e\right)}=\left(0.574\pm 0.010\left(star.\right)\pm 0.021\left(syst.\right)\right)\times {10}^{-2}.$ For the asymmetry A_ξ we get A_ξ = -0.009 ± 0.012(stat.)