Study of the decay [Formula omitted] in the OKA experiment

A high statistics data sample of the decays of [Formula omitted] mesons to three charged particles was accumulated by the OKA experiment in 2012 and 2013. This allowed to select a clean sample of about 450 events with [Formula omitted] decays with the energy of the photon in the kaon rest frame grea...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2019-04, Vol.79 (4), p.1-6
Main Authors: Shapkin, M. M, Akimenko, S. A, Artamonov, A. V, Blik, A. M, Burtovoy, V. S, Bychkov, V. N, Donskov, S. V
Format: Article
Language:English
Subjects:
Charged particles
Chiral dynamics
Kaons
Particle decay
Perturbation theory
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Summary:A high statistics data sample of the decays of [Formula omitted] mesons to three charged particles was accumulated by the OKA experiment in 2012 and 2013. This allowed to select a clean sample of about 450 events with [Formula omitted] decays with the energy of the photon in the kaon rest frame greater than 30 MeV. The measured branching fraction of the [Formula omitted], with [Formula omitted] is equal to [Formula omitted]. The measured differential branching fraction over photon energy is compared with the prediction of the chiral perturbation theory to [Formula omitted]. A search for an up-down asymmetry of the photon with respect to the hadronic system decay plane is also performed.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-019-6797-1