Article,

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

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(May 19, 2010)

Abstract

The radiative decay K->mu nu gamma has been studied at ISTRA+ setup in a new kinematical region. About 46K events of K->mu nu gamma have been observed. The sign and value of Fv-Fa have been measured for the first time. The result is Fv-Fa=0.16(4)(5).

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