%0 Journal Article
%T Measurement of the K+ -> pi0 mu+ nu_mu gamma Branching Ratio
%A The E787 Collaboration
%J Statistics
%D 2010
%I arXiv
%R 10.1103/PhysRevD.81.092001
%X A measurement of the decay K+ -> pi0 mu+ nu_mu gamma has been performed with the E787 detector at Brookhaven National Laboratory. Forty events were observed in the signal region with the background expectation of (16.5 +- 2.7) events. The branching ratio was measured to be (1.58 +- 0.46(stat.) +- 0.08(syst.)) x 10^{-5}} in the kinematic region Eg >30 MeV and theta_{mu gamma} > 20degree, where Eg is the energy of the emitted photon and theta_{mu gamma} is the angle between the muon and the photon in the K+ rest frame. The results were consistent with theoretical predictions.
%U http://arxiv.org/abs/1003.3609v2