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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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2019-04, Vol.79 (4), p.1-6
Hauptverfasser:	Shapkin, M. M, Akimenko, S. A, Artamonov, A. V, Blik, A. M, Burtovoy, V. S, Bychkov, V. N, Donskov, S. V
Format:	Artikel
Sprache:	eng
Schlagworte:	Charged particles Chiral dynamics Kaons Particle decay Perturbation theory
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	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