Experimental study of the e+e-→π0γ process in the energy region √s=0.60-0.97 GeV

被引：55

作者：

Achasov, MN ^{[1
]}

Beloborodov, KI ^{[1
]}

Berdugin, A ^{[1
]}

Bogdanchikov, AG ^{[1
]}

Bozhenok, A ^{[1
]}

Bukin, AD ^{[1
]}

Bukin, DA ^{[1
]}

Dimova, T ^{[1
]}

Druzhinin, VP ^{[1
]}

Golubev, V ^{[1
]}

Ivanchenko, VN ^{[1
]}

Korol, AA ^{[1
]}

Koshuba, S ^{[1
]}

Pakhtusova, E ^{[1
]}

Polunin, AA ^{[1
]}

Pyata, EE ^{[1
]}

Salnikov, AA ^{[1
]}

Serednyakov, SI ^{[1
]}

Shary, VV ^{[1
]}

Shatunov, YM ^{[1
]}

Sidorov, VA ^{[1
]}

Silagadze, ZK ^{[1
]}

Skrinsky, AN ^{[1
]}

Skripkin, AG ^{[1
]}

Usov, YV ^{[1
]}

Valishev, AA ^{[1
]}

Vasijev, AV ^{[1
]}

机构：

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

来源：

PHYSICS LETTERS B | 2003年 / 559卷 / 3-4期

基金：

俄罗斯基础研究基金会;

关键词：

magnetic dipole transitions; rho meson; omega meson; cross section;

D O I：

10.1016/S0370-2693(03)00336-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Results of the study of the e(+)e(-) --> pi(0)gamma process with SND detector at VEPP-2M collider in the c.m.s. energy range,roots = 0.60-0.97 GeV are presented. Using 36513 selected events, corresponding to a total integrated luminosity of 3.4 pb(-1), the e(+)e(-) --> pi(0)gamma cross section was measured. The energy dependence of the cross section was analyzed in the framework of the vector meson dominance model. The data are well described by a sum of phi, omega, rho --> pi(0)gamma decay contributions with measured decay probabilities: Br(omega --> pi(0)gamma) = (9.34 +/- 0.15 +/- 0.31)% and Br(rho(0) --> pi(0)gamma) = (5.15 +/- 1.16 +/- 0.73) x 10(-4). The rho-omega relative interference phase is phi(rhoomega) = (-10.2 +/- 6.5 +/- 2.5) degrees. (C) 2003 Published by Elsevier Science B.V.

引用

页码：171 / 178

页数：8

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