Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay

Details Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay

2000-07-12

arxiv.org/abs/hep-ex/0007021v1

Phys.Rev.Lett.85:4856-4859,2000

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 3 figures. To be submitted to PRL

Scientific paper

10.1103/PhysRevLett.85.4856

We have performed a measurement of the K^+ -> pi^+ pi^0 gamma decay and have
observed 2 X 10^4 events. The best fit to the decay spectrum gives a branching
ratio for direct photon emission of (4.7\pm0.8\pm0.3) X 10^{-6} in the pi^+
kinetic energy region of 55 to 90 MeV and requires no component due to
interference with inner bremsstrahlung.

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