Observation of the radiative kaon decay K- --> mu-pi0gammanu

Abstract

Using data collected with the ISTRA+ spectrometer during the 2001 run of the U-70 proton synchrotron in Protvino, we report the first observation of the radiative kaon decay K- -->mu-pi0gammanu. We find Br(Kmu3g)/Br(Kmu3) for two regions 5<Eg<30 and 30<Eg<60 MeV consistent with theoretical predictions. The measured angular distribution asymmetry for the first region, 0.093+/-0.141, is two standard deviations away from the theoretical prediction of 0.354. The measured asymmetry in the T-odd variable is -0.03+/-0.13.

15 pages, 8 figurs, submitted to Yadernaya Fizika

References in corpus (7)

• Radiative Semileptonic Kaon Decays
• High statistic measurement of the K- -> pi0 e- nu decay form-factors
• T-odd correlation in the $K_{l3\gamma }$-decay
• High statistic study of the K- -> pi0 mu- nu decay
• T-odd correlation in the K+ ->pi l nu gamma decays beyond Standard Model
• Measurement of the Dalitz plot slope parameters for K- -> pi0 pi0 pi- decay using ISTRA+ detector
• Measurements of the Branching Fractions and Decay Distributions for KL->πμνγand KL->πeνγ

Cited by in corpus (6)

• Experiments with K-Meson Decays
• $K_{l3\gamma }^{+}$ decays revisited: branching ratios and T-odd momenta correlations
• T-odd correlations in radiative K_l3^+ decays and chiral perturbation theory
• Study of $K^{+}\to {\pi }^0{e}^{+}\nu \gamma$ decay with OKA setup
• Measurement of the K+ -> pi0 mu+ nu_mu gamma Branching Ratio
• $K_{l3\gamma }^0$ decays: branching ratios and T-odd momenta correlations