STUDY OF DYNAMICS OF PHI-]PI(-)PI(0) DECAY WITH CMD-2 DETECTOR()PI()

Authors
AKHMETSHIN RR AKSENOV GA ANASHKIN EV ARPAGAUS M BAIBUSINOV BO BANZAROV VS BARKOV LM BONDAR AE CHERNYAK DV DANILOV VV DVORETSKY AS EIDELMAN SI FEDOTOVICH GV GABYSHEV NI GREBENIUK AA GRIGORIEV DN IVANOV PM KHAZIN BI KOOP IA KURDADZE LM KUZMIN AS LOGASHENKO IB LUKIN PA MERZLYAKOV YI NESTERENKO IN OKHAPKIN VS POLUNIN AA PTITZYN VI PURLATZ TA ROOT NI RUBAN AA RYSKULOV NM SHAMOV AG SHATUNOV YM SHWARTZ BA SIDOROV VA SKRINSKY AN SMAKHTIN VP SNOPKOV IG SOLODOV EP STEPANOV PY SUKHANOV AI TITOV VM YUDIN YV ZVEREV SG BROWN DH ROBERTS BL THOMPSON JA HUGHES VW
Citation
Rr. Akhmetshin et al., STUDY OF DYNAMICS OF PHI-]PI(-)PI(0) DECAY WITH CMD-2 DETECTOR()PI(), Physics letters. Section B, 434(3-4), 1998, pp. 426-436
Citations number
31
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
434
Issue
3-4
Year of publication
1998
Pages
426 - 436
Database
ISI
SICI code
0370-2693(1998)434:3-4<426:SODOPD>2.0.ZU;2-5
Abstract
A study of the phi --> pi(+) pi(-) pi(0) decay mode has been performed using a data sample of about 2.0 million phi decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. The following param eters of the phi-meson have been measured: Br(phi --> pi(+) pi(-) pi(0 )) = 0.145 +/- 0.009 +/- 0.003 and delta(phi-omega) = 162 +/- 17 degre es. The analysis of the Dalitz plot showed the dominance of the phi -- > rho pi intermediate mechanism, the limits for the ratio of the direc t amplitude of phi --> 3 pi to that of phi --> rho pi are -0.16 < a(1) < 0.11 at 90% C.L. The upper limits for the probabilities of the deca y modes phi --> pi(+) pi(-) eta and direct phi --> rho gamma gamma hav e been found for the first time: Br(phi --> pi(+) pi(-) eta) < 3 x 10( -4) and Bl.(phi --> rho gamma gamma) < 5 x 10(-4) at 90% C.L. (C) 1998 Published by Elsevier Science B.V. All rights reserved.