Measurement of the η → π+π-e+e- decay branching ratio

被引：23
|
作者：
Bargholtz, Chr.
Bashkanov, M.
Bogoslawsky, D.
Calen, H.
Cappellaro, F.
Clement, H.
Demiroers, L.
Ekstrom, C.
Fransson, K.
Geren, L.
Gustafsson, L.
Hoistad, B.
Ivanov, G.
Jacewicz, M. [1 ]
Jiganov, E.
Johansson, T.
Keleta, S.
Koch, I.
Kullander, S.
Kupsc, A.
Kuznetsov, A.
Laukhin, I. V.
Lindberg, K.
Marciniewski, P.
Meier, R.
Morosov, B.
Oelert, W.
Pauly, C.
Pettersson, H.
Petukhov, Y.
Povtorejko, A.
Ruber, R. J. M. Y.
Schonning, K.
Scobel, W.
Shafigullin, R.
Shwartz, B.
Skorodko, T.
Sopov, V.
Stepaniak, J.
Tchernyshev, V.
Tegner, P. -E.
Engblom, P. Thorngren
Tikhomirov, V.
Turowiecki, A.
Wagner, G. J.
Wolke, M.
Yamamoto, A.
Zabierowski, J.
Zartova, I.
Zlomanczuk, J.
机构：
[1] Univ Uppsala, S-75105 Uppsala, Sweden
[2] Univ Stockholm, S-10691 Stockholm, Sweden
[3] Univ Tubingen, Inst Phys, D-72074 Tubingen, Germany
[4] Joint Nucl Res Inst, Dubna 141980, Russia
[5] Univ Hamburg, Inst Expt Phys, D-2000 Hamburg, Germany
[6] Moscow Phys Engn Inst, Moscow, Russia
[7] Forschungszentrum Julich, Inst Kernphys, Julich, Germany
[8] Budker Inst Nucl Phys, Novosibirsk 630090, Russia
[9] Inst Theoret & Expt Phys, Moscow 117259, Russia
[10] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland
[11] Soltan Inst Nucl Studies, Lodz, Poland
[12] Inst Phys Expt, Warsaw, Poland
[13] High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan
来源：
PHYSICS LETTERS B | 2007年 / 644卷 / 5-6期
关键词：
eta meson decays; dalitz decays;
D O I：
10.1016/j.physletb.2006.12.008
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The reaction pd -> He-3 eta at threshold was used to provide a clean source of eta mesons for decay studies with the WASA detector at CELSIUS. The branching ratio of the decay eta -> pi(+)pi(-)e(+)e(-) is measured to be (4.3 +/- 1.3 +/- 0.4) x 10(-4). (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：299 / 303
页数：5
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