A New Measurement of the Radiative Ke3 Branching Ratio and Photon Spectrum

Details A New Measurement of the Radiative Ke3 Branching Ratio and Photon Spectrum A New Measurement of the Radiative Ke3 Branching Ratio and Photon Spectrum

2001-06-14

arxiv.org/abs/hep-ex/0106062v1

Phys.Rev.D64:112004,2001

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 6 figures, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.64.112004

We present a new measurement of the branching ratio of the decay K_L -> pi e nu gamma (Ke3g) with respect to K_L -> pi e nu (Ke3), and the first study of the photon energy spectrum in this decay. We find BR(Ke3g, E*g>30 MeV, theta*_eg>20 deg)/BR(Ke3) = 0.908 +- 0.008 (stat.) +0.013-0.012 (syst.). Our measurement of the spectrum is consistent with inner bremsstrahlung as the only source of photons in Ke3g.

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