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arxiv: hep-ex/0511060 · v2 · submitted 2005-11-30 · ✦ hep-ex

New result on the measurement of the direct photon emission in K+ --> pi^+ pi⁰ gamma decay

classification ✦ hep-ex
keywords decayresultdirectemissiongammameasurementphotonassumption
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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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