Exclusive measurements of pd → 3He ππ:: The ABC effect revisited

被引：56

作者：

Bashkanov, M.

Bogoslawsky, D.

Calen, H.

Cappellaro, F.

Clement, H.

Demiroers, L.

Ekstrom, C.

Fransson, K.

Greiff, J.

Gustafsson, L.

Hoistad, B.

Vanov, G.

Jacewicz, M.

Jiganov, E.

Johansson, T.

Khakimova, O.

Kaskulov, M. M.

Keleta, S.

Koch, I.

Kren, F.

Kullander, S.

Kupsc, A.

Kuznetsov, A.

Marciniewski, P.

Meier, R.

Morosov, B.

Oelert, W.

Pauly, C.

Petukho, Y.

Povtorejko, A.

Ruber, R. J. M. Y.

Scobel, W.

Skorodko, T.

Shwartz, B.

Sopov, V.

Stepaniak, J.

Tchernyshev, V.

Thorngren-Engblom, P.

Tikhomirov, V.

Turowiecki, A.

Wagner, G. J.

Wolke, M.

Yamamoto, A.

Zabierowski, J.

Zlomanczuk, J.

机构：

[1] Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany

[2] Joint Nucl Res Inst, Dubna 141980, Russia

[3] Svedberg Lab, S-75121 Uppsala, Sweden

[4] Uppsala Univ, Uppsala, Sweden

[5] Univ Hamburg, Hamburg, Germany

[6] Forschungszentrum Julich, Julich, Germany

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

[8] Inst Theoret & Expt Phys, Moscow 117259, Russia

[9] Soltan Inst Nucl Studies, PL-00681 Warsaw, Poland

[10] Soltan Inst Nucl Studies, Lodz, Poland

[11] Univ Warsaw, Inst Expt Phys, Warsaw, Poland

[12] High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan

来源：

PHYSICS LETTERS B | 2006年 / 637卷 / 4-5期

关键词：

D O I：

10.1016/j.physletb.2006.03.082

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Exclusive measurements of the reactions pd -> He-3 pi(+)7 pi(-) and pd -> He-3 pi(0)pi(0) have been carried out at T-p = 0.893 GeV at the CELSIUS storage ring using the WASA detector. The pi(+)pi(-) channel evidences a pronounced enhancement at low invariant pi pi masses-as anticipated from previous inclusive measurements of the ABC effect. This enhancement is seen to be even much larger in the isoscalar pi(0)pi(0) channel. The differential distributions prove this enhancement to be of scalar-isoscalar nature. Delta Delta calculations give a good description of the data, if a boundstate condition is imposed for the intermediate Delta Delta system. (c) 2006 Elsevier B.V. All fights reserved.

引用

页码：223 / 228

页数：6

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