TO CONDENSE OR NOT TO CONDENSE - THAT IS THE QUESTION

被引：56

作者：

DELORME, J ^{[1
]}

ERICSON, M ^{[1
]}

ERICSON, TEO ^{[1
]}

机构：

[1] CERN,CH-1211 GENEVA 23,SWITZERLAND

来源：

PHYSICS LETTERS B | 1992年 / 291卷 / 04期

关键词：

D O I：

10.1016/0370-2693(92)91391-L

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the dependence of the pion mass in the nuclear medium with density and the condition for s-wave pion condensation. We base our approach on multiple scattering and the consistent use of the chiral off-mass-shell properties of the piN amplitude. We find important modifications of the results based on an effective lagrangian approach. These arise from the energy dependence of the tauN amplitude with the small scattering length, which lead to a different behaviour of the density dependence and a suppression of condensation. Our results also suggest that the ratio of the effective to the real pion mass goes to unity in the chiral limit.

引用

页码：379 / 384

页数：6

共 16 条

[1] SCATTERING FROM NON-OVERLAPPING POTENTIALS .1. GENERAL FORMULATION [J].