Measurement of the radiative decay K + → π 0 e + vγ at the NA62 experiment

Abstract

Abstract The NA62 experiment at CERN reports results from a study of radiative kaon decay K + → π 0 e + vγ, using a data sample recorded in the years 2017 and 2018. The sample comprises O(100k) candidates with sub-percent background contamination. Preliminary results of the most precise measurement of the corresponding branching ratio and with the measurement of the T-asymmetry parameter are presented.