Measurement of the decay rate of the radiative K-e3(0) decay

Measurement of the decay rate of the radiative K-e3(0) decay

Data from the NA31 experiment at CERN have been used to measure the decay KL → π±e∓vy (K0e3γ). 1384 ± 53 events of this decay type have been observed. The decay rate relative to K0e3 is found to be Γ(K0e3γ, E(Black star)γ ≥ 30 MeV, Θ(Black star)e-γ ≥ 20°)/Γ(K0e3) = (0.934 ± 0.036 (stat.) +0.055-0.03...

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Bibliographic Details
Main Authors: Leber, F, Beier, T, Blumer, H, Coward, D, Kleinknecht, K, Renk, B, Sander, H, Scheerer, F, Scheidt, J, Staeck, J, Wagner, A, Barr, G, Buchholz, P, Doble, N, Gatignon, L, Grafstrom, P, Hagelberg, R, Wahl, H, Peach, K, Auge, E, Fournier, D, IconomidouFayard, L, Perdereau, O, Schaffer, A, Serin, L
Format: Journal article
Language:English
Published: 1996
Description
Summary:Data from the NA31 experiment at CERN have been used to measure the decay KL → π±e∓vy (K0e3γ). 1384 ± 53 events of this decay type have been observed. The decay rate relative to K0e3 is found to be Γ(K0e3γ, E(Black star)γ ≥ 30 MeV, Θ(Black star)e-γ ≥ 20°)/Γ(K0e3) = (0.934 ± 0.036 (stat.) +0.055-0.039 (syst.))% which corresponds to a branching ratio of BR(K0e3γ, E(Black star)γ ≥ 30 MeV, Θ(Black star)e-γ ≥ 20°) = (0.361 ± 0.014(stat.) +0.021-0.015 (syst.))%. The result is in good agreement with theoretical predictions. The decay KL → π±e∓vγ is found to be dominated by internal bremsstrahlung.

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