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

Authors

Akhmetshin, RR Anashkin, EV Arpagaus, M Aulchenko, VM Banzarov, VS Barkov, LM Baru, SE Bashtovoy, NS Bondar, AE Bondarev, DV Bragin, AV Chernyak, DV Chertovskikh, AG Dvoretsky, AS Eidelman, SI Fedotovich, GV Gabyshev, NI Grebeniuk, AA Grigoriev, DN Ivanov, PM Karpov, SV Khazin, BI Koop, IA Kurdadze, LM Kuzmin, AS Logashenko, IB Lukin, PA Mikhailov, KY Nesterenko, IN Okhapkin, VS Perevedentsev, EA Popov, AS Purlatz, TA Root, NI Ruban, AA Ryskulov, NM Shamov, AG Shatunov, YM Shekhtman, AI Shwartz, BA Sidorov, VA Skrinsky, AN Smakhtin, VP Snopkov, IG Solodov, EP Stepanov, PY Sukhanov, AI Titov, VM Yudin, YV Zverev, SG Thompson, JA

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

Categorie Soggetti

Physics

Journal title

PHYSICS LETTERS B

ISSN journal

03702693 → ACNP

Volume

456

Issue

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.