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

Abstract

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.

arXiv comment14 pages, 7 figures, 3 tables (Fig.1 which had problems with uploading first time is replaced. Besides introduction is changed to bring into accordance with the version published in Eur.Phys.J.C.)

References in corpus (7)

• Non-Leptonic Kaon Decays and the Chiral Anomaly
• The Chiral Anomaly in Non-Leptonic Weak Interactions
• Apparatus for a Search for T-violating Muon Polarization in Stopped-Kaon Decays
• $K\to \pi \pi \gamma$ decays: a search for novel couplings in kaon decays
• Measurement of Direct Photon Emission in K^+ -> pi^+ pi^0 gamma Decay
• Measurement of direct photon emission in $K^{+}\to {\pi }^{+}{\pi }^0\gamma$ decay using stopped positive kaons
• Experimental study of direct photon emission in K- --> pi- pi0 gamma decay using ISTRA+ detector

Cited by in corpus (2)

• Measurement of the direct emission and interference terms and search for CP violation in the decay K\pm -> π\pmπ^0 g
• Form factor in K+ --> pi+ pi0 gamma: interference versus direct emission