Extraction of Kaon Formfactors from K^- -> mu^- nu_mu gamma Decay at ISTRA+ Setup

V. A. Duk,V.N. Bolotov,A. A. Khudyakov,V. A. Lebedev,A. I. Makarov,V. P. Novikov,A. Yu. Polyarush,S.A. Akimenko,G.I. Britvich,A. P. Filin,Alexander Inyakin,I Ya Korolkov,V. M. Leontiev,Vladimir Obraztsov,V. A. Polyakov,V.I. Romanovsky,O. G. Tchikilev,V A Uvarov,Oleg Yushchenko

Extraction of Kaon Formfactors from K^- -> mu^- nu_mu gamma Decay at ISTRA+ Setup

2010

V. A. Duk
V.N. Bolotov
A. A. Khudyakov
V. A. Lebedev
A. I. Makarov
V. P. Novikov
A. Yu. Polyarush
S.A. Akimenko
G.I. Britvich
A. P. Filin
Alexander Inyakin
I Ya Korolkov
V. M. Leontiev
Vladimir Obraztsov
V. A. Polyakov
V.I. Romanovsky
O. G. Tchikilev
V A Uvarov
Oleg Yushchenko

The radiative decay K->mu nu gamma has been studied at ISTRA+ setup in a new kinematical region. About 22K events of K^- -> mu^- nu_mu gamma have been observed. The sign and value of Fv-Fa have been measured for the first time. The result is Fv-Fa=0.21(4)(4).

Keywords:

Particle physics
Gamma ray
Radiative transfer
Physics
radiative decay

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