Ke3 Decay Studies in the OKA Experiment

Resumo

Recent results from OKA setup concerning form factor studies in Ke3 decay are presented. About 5.25 M events obtained for decays of 17.7 GeV/cK+ are selected for the analysis. The linear and quadratic slopes for the decay form factor f+(t) are measured: λ'+ = 2.95 ± 0.022 ± 0.018 × 10 -2 for the linear slope fit and λ+ = 2.611 ± 0.035 ± 0.028 × 10 -2, λ"+ = 1.91 ± 0.19 ± 0.14 × 10 -3 for the quadratic one. The scalar and tensor contributions are compatible with zero. Several alternative parametrizations are tried: the Pole fit parameter is found to be MV = 891 ± 3 MeV; the parameter of the dispersive parametrization is measured to be Λ+ = 2.458 ± 0.018 × 10-2.

Sobre autores

O. Yushchenko

Institute for High Energy Physics

Autor responsável pela correspondência
Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Kurshetsov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Filin

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

S. Akimenko

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Artamonov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Blik

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Brekhovskikh

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Burtovoy

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

S. Donskov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Inyakin

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Gorin

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

G. Khaustov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

S. Kholodenko

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Kolosov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Konstantinov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Leontiev

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Lishin

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

M. Medynsky

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

Yu. Mikhailov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Obraztsov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Polyakov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Popov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Romanovsky

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Rykalin

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

A. Sadovsky

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Samoilenko

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Semenov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

O. Stenyakin

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

O. Tchikilev

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Uvarov

Institute for High Energy Physics

Email: Oleg.Yushchenko@ihep.ru
Rússia, Protvino, Moscow region, 142281

V. Duk

Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Troitsk, Moscow, 142190

S. Filippov

Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Troitsk, Moscow, 142190

E. Guschin

Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Troitsk, Moscow, 142190

Yu. Kudenko

Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Troitsk, Moscow, 142190

A. Khudyakov

Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Troitsk, Moscow, 142190

V. Kravtsov

Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Troitsk, Moscow, 142190

A. Polyarush

Joint Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Dubna, Moscow region, 141980

V. Bychkov

Joint Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Dubna, Moscow region, 141980

G. Kekelidze

Joint Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Dubna, Moscow region, 141980

V. Lysan

Joint Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Dubna, Moscow region, 141980

B. Zalikhanov

Joint Institute for Nuclear Research

Email: Oleg.Yushchenko@ihep.ru
Rússia, Dubna, Moscow region, 141980

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