New result on the measurement of the direct photon emission in K+ --> pi^+ pi^0 gamma decay

Details New result on the measurement of the direct photon emission in K+ --> pi^+ pi^0 gamma decay New result on the measurement of the direct photon emission in K+ --> pi^+ pi^0 gamma decay

2005-11-30

arxiv.org/abs/hep-ex/0511060v2

Eur.Phys.J.C46:61-67,2006

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 7 figures, 3 tables (Fig.1 which had problems with uploading first time is replaced. Besides introduction is changed

Scientific paper

10.1140/epjc/s2006-02492-y

We present a new result on the K^+ --> pi^+ pi^0 gamma decay measurement using stopped kaons. The best fit to the decay spectrum comprised of 10k events gives a branching ratio for the direct photon emission of [3.8+-0.8(stat)+-0.7(syst)] times 10^{-6} in the pi^+ kinetic energy region of 55 to 90 MeV. This result has been obtained with the assumption that there is no component due to interference with the inner bremsstrahlung.

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