抄録
We have searched for the K+→π+γγ decay in the kinematic region with π+ momentum close to the end point. No events were observed, and the 90% confidence-level upper limit on the partial branching ratio was obtained, B(K+→π +γγ,P>213 MeV/c)<8.3×10-9 under the assumption of chiral perturbation theory including next-to-leading order "unitarity" corrections. The same data were used to determine an upper limit on the K+→π+γ branching ratio of 2.3×10-9 at the 90% confidence level.
本文言語 | 英語 |
---|---|
ページ(範囲) | 192-199 |
ページ数 | 8 |
ジャーナル | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
巻 | 623 |
号 | 3-4 |
DOI | |
出版ステータス | 出版済み - 9月 15 2005 |
外部発表 | はい |
!!!All Science Journal Classification (ASJC) codes
- 核物理学および高エネルギー物理学