Measurement of direct photon emission in $K^+ \to π^+ π^0 γ$ decay using stopped positive kaons

Details Measurement of direct photon emission in $K^+ \to π^+ π^0 γ$ decay using stopped positive kaons Measurement of direct photon emission in $K^+ \to π^+ π^0 γ$ decay using stopped positive kaons

2002-12-19

arxiv.org/abs/hep-ex/0212048v1

Phys.Lett.B554:7-14,2003

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 6 figures, 2 tables, to be published in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(02)03236-7

The radiative decay $K^+ \to \pi^+ \pi^0 \gamma$ ($K_{\pi 2 \gamma}$) has been measured with stopped positive kaons. A $K_{\pi 2 \gamma}$ sample containing 4k events was analyzed, and the $K_{\pi 2 \gamma}$ branching ratio of the direct photon emission process was determined to be $[6.1\pm2.5({\rm stat})\pm1.9({\rm syst})]\times 10^{-6}$. No interference pattern with internal bremsstrahlung was observed.

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