Measurement of K+ π0 μ+ νγdecay using stopped kaons
E470 Collaboration, S. Shimizu, K. Horie, M. A. Aliev, Y. Asano, T. Baker, P. Depommier, M. Hasinoff, Y. Igarashi, J. Imazato, A. P. Ivashkin, M. M. Khabibullin, A. N. Khotjantsev, Y. G. Kudenko, A. S. Levchenko, G. Y. Lim, J. A. Macdonald, O. V. Mineev, C. Rangacharyulu, S. Sawada
Abstract
The K+ π0 μ+ νγ(Kμ3 γ) decay has been measured with stopped positive kaons at the KEK 12 GeV proton synchrotron. A Kμ3 γ sample containing 125 events was obtained. The partial branching ratio Br(Kμ3 γ, Eγ>30 MeV, θμ+ γ>20) was found to be [2.4 0.5(stat) 0.6(syst)]× 10-5, which is in good agreement with theoretical predictions.
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