Study of dynamics of φ→π+π-π0 decay with CMD-2 detector

被引：54

作者：

Akhmetshin, RR ^{[1
]}

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

机构：

[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[2] Boston Univ, Boston, MA 02215 USA

[3] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[4] Yale Univ, New Haven, CT 06511 USA

来源：

PHYSICS LETTERS B | 1998年 / 434卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(98)00826-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 parameters 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 degrees. The analysis of the Dalitz plot showed the dominance of the phi --> rho pi intermediate mechanism, the limits for the ratio of the direct 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 decay modes phi --> pi(+) pi(-) eta and direct phi --> rho gamma gamma have 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.

引用

页码：426 / 436

页数：11

共 31 条

[1] SIGNATURE OF THE TRIANGLE SINGULARITY IN THE REACTION E+E--]PI+PI-PI-0 [J].

ACHASOV, NN ;

KOZHEVNIKOV, AA .

PHYSICAL REVIEW D, 1994, 49 (11) :5773-5778

[2] Measurement of phi meson parameters with CMD-2 detector at VEPP-2M collider [J].

Akhmetshin, RR ;

Aksenov, GA ;

Anashkin, EV ;

Aulchenko, VM ;

Baibusinov, BO ;

Banzarov, VS ;

Barkov, LM ;

Baru, SE ;

Bondar, AE ;

Danilov, VV ;

Eidelman, SJ ;

Fedotovich, GV ;

Gabyshev, NI ;

Grebeniuk, AA ;

Grigoriev, DN ;

Ivanov, PM ;

Khazin, BI ;

Koop, IA ;

Kuzmin, AS ;

Logashenko, IB ;

Lysenko, AP ;

Maksimov, AV ;

Merzlyakov, YI ;

Monitch, VA ;

Nesterenko, IN ;

Okhapkin, VS ;

Perevedentsev, EA ;

Polunin, AA ;

Popkov, EV ;

Ptitzyn, VI ;

Purlats, TA ;

Redin, SI ;

Root, NI ;

Ruban, AA ;

Ryskulov, NM ;

Shatunov, YM ;

Sher, AE ;

Shubin, MA ;

Schwartz, BA ;

Sidorov, VA ;

Skrinsky, AN ;

Smakhtin, VP ;

Snopkov, IG ;

Solodov, EP ;

Sukhanov, AI ;

Titov, VM ;

Yudin, YV ;

Zavarzin, VG ;

Brown, DH ;

Miller, JP .

PHYSICS LETTERS B, 1995, 364 (03) :199-206

[3]

AKHMETSHIN RR, 1997, P INT C HADRON 97 BN

[4]

AKSENOV GA, 1985, 85118 INP

[5]

ANASHIN VV, 1984, 84114 INP

[6] Z-CHAMBER AND THE TRIGGER OF THE CMD-2 DETECTOR [J].

ANASHKIN, EV ;

AULCHENKO, VM ;

FEDORENKO, VE ;

FEDOTOVICH, GV ;

KHAZIN, BI ;

MAXIMOV, AV ;

PISKUNOV, GS ;

SNOPKOV, IG ;

SOLODOV, EP ;

TITOV, VM ;

ZAVARZIN, VG ;

YUDIN, YV .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1992, 323 (1-2) :178-183

[7] A COORDINATE SYSTEM OF THE CMD-2 DETECTOR [J].

ANASHKIN, EV ;

AULCHENKO, VM ;

BARU, SE ;

FEDORENKO, VE ;

FEDOTOVICH, GV ;

KHAZIN, BI ;

SAVINOV, GA ;

SNOPKOV, IG ;

SOLODOV, EP ;

ZAVARZIN, VG ;

YUDIN, YV .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1989, 283 (03) :752-754

[8]

ANASHKIN EV, 1988, ICFA INSTR B, V5, P18

[9] CMD-2 BARREL CALORIMETER [J].

AULCHENKO, VM ;

BAIBUSINOV, BO ;

BONDAR, AE ;

KUZMIN, AS ;

LEONTIEV, LA ;

OKHAPKIN, VS ;

PESTSOV, LV ;

SMAKHTIN, VP ;

SUKHANOV, AI ;

SHWARTZ, BA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1993, 336 (1-2) :53-58

[10] IS THE RHO-MESON A DYNAMICAL GAUGE BOSON OF HIDDEN LOCAL SYMMETRY [J].

BANDO, M ;

KUGO, T ;

UEHARA, S ;

YAMAWAKI, K ;

YANAGIDA, T .

PHYSICAL REVIEW LETTERS, 1985, 54 (12) :1215-1218

← 1 2 3 4 →