Bnl - 68328 Princeton / Hep / 2001 - 1 Tri – Pp –
نویسندگان
چکیده
We have performed a search for the angular-momentum forbidden decay K+→π+γ with the E787 detector at BNL. No events were observed in the π+ kinematic region around 227 MeV/c. An upper limit on the branching ratio for the decay is determined to be 3.6× 10−7 at 90% confidence level. Typeset using REVTEX
منابع مشابه
O ct 1 99 7 BNL - 64627 PRINCETON / HEP / 97 - 11 TRI – PP – 97 – 27 KEK Preprint 97 - 114 Observation of the Decay K + → π + μ + μ −
We have observed the rare decay K+→π+μ+μ− and measured the branching ratio Γ(K+→π+μ+μ−)/Γ(K+→all) = (5.0± 0.4stat ± 0.7syst ± 0.6th)× 10−8. We compare this result with predictions from chiral perturbation theory and estimates based on the decay K+→π+e+e−. PACS numbers: 13.20.Eb, 12.39.Fe Typeset using REVTEX
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