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

页码：299 / 303

页数：5

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