New measurement of the rare decay K+ --> pi(+)&mgr;(+)&mgr;(-) |
| |
Authors: | Ma Appel Atoyan Bassalleck Bergman Cheung Dhawan Do Egger Eilerts Fischer Herold Issakov Kaspar Kraus Lazarus Lichard Lowe Lozano Majid Menzel Pislak Poblaguev Rehak Sher Thompson |
| |
Affiliation: | Brookhaven National Laboratory, Upton, New York 11973, USA. |
| |
Abstract: | More than 400 K+-->pi(+)&mgr;(+)&mgr;(-) events were observed in a rare K+ decay experiment at the Brookhaven Alternating Gradient Synchrotron. Normalized to the K+-->pi(+)pi(+)pi(-) decay, the branching ratio is determined to be [9.22+/-0.60(stat)+/-0. 49(syst)]x10(-8). This branching ratio and the &mgr;&mgr; mass spectrum is in very good agreement with the measurement of the K+-->pi(+)e(+)e(-) decay, but deviates significantly from the previous measurement. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|