Study of the process e+e- → π0π0γ in c.m. energy range 600-970 MeV at CMD-2

被引：20

作者：

Akhmetshin, RR ^{[1
]}

Aulchenko, VM

Banzarov, VS

Baratt, A

Barkov, LM

Baru, SE

Bashtovoy, NS

Bondar, AE

Bondarev, DV

Bragin, AV

Eidelman, SI

Epifanov, DA

Fedotovitch, GV

Gabyshev, NI

Gorbachev, DA

Grebeniuk, AA

Grigoriev, DN

Ignatov, FV

Karpov, S

Kazanin, VR

Khazin, BI

Koop, IA

Krokovny, PP

Kuzmin, AS

Logashenko, IB

Lukin, PA

Lysenko, AP

Mikhailov, KY

Milstein, AI

Nesterenko, IN

Okhapkin, VS

Otboev, A

Perevedentsev, EA

Polunin, AA

Popov, AS

Redin, SI

Root, NI

Ruban, AA

Ryskulov, NM

Shamov, AG

Shatunov, YM

Shwartz, BA

Sibidanov, AL

Sidorov, VA

Skrinsky, AN

Snopkov, IG

Solodov, EP

Stepanov, PY

Thompson, JA

Valishev, AA

机构：

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

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

[3] Univ Pittsburgh, Pittsburgh, PA 15260 USA

来源：

PHYSICS LETTERS B | 2004年 / 580卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.physletb.2003.11.046

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The cross section of the process e(+)e(-) --> pi(0)pi(0)gamma has been measured in the c.m. energy range 600-970 MeV with the CMD-2 detector. The following branching ratios have been determined: B(rho(0) --> pi(0)pi(0)gamma) = (5.2(-1.3)(+1.5) +/- 0.6) x 10(-5) and B(omega --> pi(0)pi(0)gamma) = (6.4(-2.0)(+2.4) +/- 0.8) x 10(-5). Evidence for the rho(0) --> f(0)(600)gamma decay has been obtained: B(rho(0) --> f(0)(600)gamma) = (6.0(-2.7)(+3.3) +/- 0.9) x 10(-5). From a search for the process e(+)e(-) --> etapi(0)gamma the following upper limit has been obtained: B(omega --> etapi(0)gamma) < 3.3 x 10(-5) at 90% CL. (C) 2003 Published by Elsevier B.V.

引用

页码：119 / 128

页数：10

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