Measurement of the Radiative Ke3 Branching Ratio

Details Measurement of the Radiative Ke3 Branching Ratio Measurement of the Radiative Ke3 Branching Ratio

2004-11-22

arxiv.org/abs/hep-ex/0411069v2

Phys.Lett.B605:247-255,2005

Physics

High Energy Physics

High Energy Physics - Experiment

13 pages, 7 figures. submitted to Phys. Lett. B

Scientific paper

10.1016/j.physletb.2004.11.056

We present a measurement of the relative branching ratio of the decay KL -> pi e nu gamma (Ke3gamma) with respect to KL-> pi e nu (gamma) (Ke3+Ke3gamma) decay. The result is based on observation of 19 000 Ke3gamma and 5.6 x 10^6 Ke3 decays. The value of the branching ratio is Br(Ke3gamma, Egamma^*>30 MeV,theta(e,gamma)^*>20^o)/Br(Ke3)= (0.964+-0.008+0.011-0.009)%. This result agrees with theoretical predictions but is at variance with a recently published result.

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