24 July 2022 to 2 August 2022
House of International Conferences
Europe/Moscow timezone

Measurement of the T-odd correlation in the K+ --> e^{+} nu pi^{0} gamma radiative decay at OKA setup

30 Jul 2022, 16:42
12m
House of International Conferences

House of International Conferences

Dubna, Russia
Talk (10+2 min) Young Scientist Forum Young Scientist Forum

Speaker

Ilia Tiurin (NRC KI - IHEP)

Description

Measurements of the T-odd correlation in the K+ --> e^{+} nu pi^{0} gamma radiative
decay are performed at the "OKA" detector exposed to 18 GeV/c RF separated beam of
the U-70 PS. About 100K events of the decay are selected with a background of 15%.
The measured correlation ksi is a mixed product of the e^{+}, pi^{0} and gamma
momenta in the kaon rest frame, normalised to M_{K}^{3}. For the estimate of the T-
odd asymmetry a variable A_ksi = N_{+}-N_{-} / N_{+}+N_{-}, where N_{+-} is the
number of events with ksi > (<) 0 is used . The measurement of the asymmetry gives:
A_ksi = ( -2.1 +- 4.3 (stat) +- 1.1 (syst) ) x 10^(-3), or | A_ksi |< 7.8 x 10^{-3}
at 90% C.L.

Primary author

S.A. Akimenko, A.V. Artamonov, A.M. Gorin, S.V. Donskov, A.V. Inyakin, V.N. Kolosov, V.F. Kurshetsov, M.V. Medynsky, Yu.V. Mikhailov, V.F. Obraztsov, A.V. Okhotnikov, V.A. Polyakov, V.I. Romanovsky, V.I. Rykalin, A.S. Sadovsky, V.D. Samoilenko, O.V. Stenyakin, I.S. Tiurin, V.A. Uvarov, A.P. Filin, G.V. Khaustov, S.A. Kholodenko, O.P. Yushchenko

Co-authors

E.N. Guschin, V.I. Kravtsov, Yu.G. Kudenko, A.Yu. Polyarush, S.N. Filippov, A.A. Khudyakov V.N. Bychkov, B.Zh. Zalikhanov, G.D. Kekelidze, V.M. Lysan

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