SIGMA-MESON AND RHO-MESON STRENGTH DISTRIBUTIONS FROM IN-MEDIUM CORRECTED PI-PI CORRELATIONS

被引：53

作者：

CHANFRAY, G

AOUISSAT, Z

SCHUCK, P

NORENBERG, W

机构：

[1] UNIV GRENOBLE 1,INST SCI NUCL,F-38026 ST MARTIN DHERES,FRANCE

[2] GSI DARMSTADT,W-6100 DARMSTADT 11,GERMANY

来源：

PHYSICS LETTERS B | 1991年 / 256卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(91)91770-V

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The experimental phase shifts of pi-pi scattering in the J = I = O (sigma-meson) and J = I = 1 (rho-meson) channels are reproduced using phenomenological T-matrices. In a nuclear medium the pion dispersion relation is strongly changed and so is the interacting 2-pi propagator. Corresponding sigma- and rho-meson strength distributions are extracted and shown to accumulate considerable strength around the 2-pi threshold. For the rho-meson this may be related to recent experimental results from dilepton production.

引用

页码：325 / 330

页数：6

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