Observation of K-S(0) semileptonic decays with the CMD-2 detector

Citation
Rr. Akhmetshin et al., Observation of K-S(0) semileptonic decays with the CMD-2 detector, PHYS LETT B, 456(1), 1999, pp. 90-94
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
456
Issue
1
Year of publication
1999
Pages
90 - 94
Database
ISI
SICI code
0370-2693(19990603)456:1<90:OOKSDW>2.0.ZU;2-J
Abstract
The decay K-S(0) --> pi ev has been observed by the CMD-2 detector at the e (+)e(-) collider VEPP-2M at Novosibirsk. Of 6 million produced (KLKS0)-K-0 pairs, 75 +/- 13 events of the K-S0 --> pi ev decay were selected. The corr esponding branching ratio is B( K-S(0) --> pi ev)=(7.2 +/- 1.4) X 10(-4). T his result is consistent with the evaluation of B( K-S(O) --> pi ev) from t ile K-L(0),(C) semileptonic rate and K-S(0) lifetime assuming Delta S =Delt a Q. (C) 1999 Published by Elsevier Science B.V. All rights reserved.