Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay
arXiv:hep-ex/0007021 · doi:10.1103/PhysRevLett.85.4856
Abstract
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.
9 pages, 3 figures. To be submitted to PRL