Regular Article - Experimental Physics
Study of decay with OKA setup
Institute for Nuclear Research of the Russian Academy of Sciences, 117312, Moscow, Russia
2 “NRC Kurchatov Institute-IHEP”, 142281, Protvino, Russia
3 Joint Institute of Nuclear Research, 141980, Dubna, Russia
4 INFN-Sezione di Perugia, Via A. Pascoli, 06123, Perugia, Italy
5 National Research Nuclear University (MEPhI), Moscow, Russia
6 Institute of Physics and Technology, Moscow, Russia
Accepted: 19 January 2021
Published online: 16 February 2021
Results of a study of the decay at OKA setup are presented. More than 32,000 events of this decay are observed. The differential spectra over the photon energy and the photon–electron opening angle in kaon rest frame are presented. The branching ratios, normalized to that of decay are calculated for different cuts on and . In particular, the branching ratio for MeV and is measured R = = = (0.587±0.010(stat.)±0.015(syst.)), which is in a good agreement with ChPT calculations.
© The Author(s) 2021
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