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
