Search for the radiative decay η → π0γγ in the SND experiment at VEPP-2M

被引：15

作者：

Achasov, MN ^{[1
]}

Beloborodov, KI

Berdyugin, AV

Bozhenok, AV

Bogdanchikov, AG

Bukin, DA

Burdin, SV

Dimova, TV

Drozdetsky, AA

Druzhinin, VP

Ganyushin, DI

Golubev, VB

Ivanchenko, VN

Koop, IA

Korol, AA

Koshuba, SV

Otboev, AV

Pakhtusova, EV

Salnikov, AA

Shary, VV

Serednyakov, SI

Shatunov, YM

Sidorov, VA

Silagadze, ZK

Skripkin, AG

Valishev, AA

Vasiljev, AV

Velikzhanin, YS

机构：

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

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

NUCLEAR PHYSICS B | 2001年 / 600卷 / 01期

关键词：

D O I：

10.1016/S0550-3213(01)00040-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The eta --> pi (0)gamma gamma decay was investigated by the SND detector at VEPP-2M e(+)e(-) collider in the reaction e(+)e(-) --> phi --> eta gamma. Here we present the results and some details of this study. We report an upper limit (90% c.l.) Br(eta --> pi (0)gamma gamma) < 8.4 x 10(-4) as our final result. Our upper limit does not contradict the earlier measurement by GAMS spectrometer. To facilitate future studies a rather detailed review of the problem is also given. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：3 / 20

页数：18

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