Is there an η3 He quasi-bound state?

被引：69

作者：

Wilkin, C. ^{[1
]}

Buescher, M.

Chiladze, D.

Dymov, S.

Hanhart, C.

Hartmann, M.

Hejny, V.

Kacharava, A.

Keshelashvili, I.

Khoukaz, A.

Maeda, Y.

Mersmann, T.

Mielke, M.

Mikirtychiants, S.

Papenbrock, M.

Rathmann, F.

Rausmann, T.

Schleichert, R.

Stroeher, H.

Taeschner, A.

Valdau, Yu.

Wronska, A.

机构：

[1] UCL, Dept Phys & Astron, London WC1E 6BT, England

[2] Forschungszentrum, Inst Kernphys, D-52425 Julich, Germany

[3] Tbilisi State Univ, Inst High Energy Phys, GE-0186 Tbilisi, Georgia

[4] Joint Inst Nucl Res, Lab Nucl Problems, Dubna 141980, Russia

[5] Univ Erlangen Nurnberg, Inst Phys 2, D-91058 Erlangen, Germany

[6] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

[7] Osaka Univ, Res Ctr Nucl Phys, Osaka 5670047, Japan

[8] Petersburg Nucl Phys Inst, Dept High Energy Phys, Gatchina 188350, Russia

[9] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland

来源：

PHYSICS LETTERS B | 2007年 / 654卷 / 3-4期

关键词：

eta production; quasi-bound states;

D O I：

10.1016/j.physletb.2007.08.041

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The observed variation of the total cross section for the dp -> He-3 eta reaction near threshold means that the magnitude of the s-wave amplitude falls very rapidly with the eta centre-of-mass momentum. It is shown here that recent measurements of the momentum dependence of the angular distribution imply a strong variation also in the phase of this amplitude. Such a behaviour is that expected from a quasi-bound or virtual eta He-3 state. The interpretation can be investigated further through measurements of the deuteron or proton analysing powers and/or spin-correlations. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：92 / 96

页数：5

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