Extraction of kaon formfactors from K−→μ−νγ decay at ISTRA+ setup

Authors :: Duk, V.A.
Bolotov, V.N.
Lebedev, V.A.
Khudyakov, A.A.
Makarov, A.I.
Polyarush, A.Yu.
Novikov, V.P.
Akimenko, S.A.
Britvich, G.I.
Filin, A.P.
Inyakin, A.V.
Korolkov, I.Ya.
Leontiev, V.M.
Obraztsov, V.F.
Polyakov, V.A.
Romanovsky, V.I.
Tchikilev, O.G.
Uvarov, V.A.
Yushchenko, O.P.
Source :: Physics Letters B. (1-4):59-66
Publisher :: Elsevier B.V.
Abstract: The radiative decay K−→μ−νμγ has been studied at ISTRA+ setup in a new kinematic region. About 22K events of K−→μ−νμγ have been observed. The sign and value of FV−FA have been measured for the first time. The result is FV−FA=0.21±0.04(stat)±0.04(syst).

Subjects :: Kaon formfactors
Chiral perturbation theory
Radiative kaon decays

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