QUARK CONDENSATE IN NUCLEAR-MATTER

被引：67

作者：

LI, GQ ^{[1
]}

KO, CM ^{[1
]}

机构：

[1] TEXAS A&M UNIV, DEPT PHYS, COLLEGE STN, TX 77843 USA

来源：

PHYSICS LETTERS B | 1994年 / 338卷 / 2-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(94)91353-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Higher-order contributions to the quark condensate in nuclear matter due to nucleon-nucleon interactions are evaluated in the Dirac-Brueckner approach with the Bonn one-boson-exchange potential. We find that at normal nuclear matter density the quark condensate with higher-order contributions is about 5% larger than the model-independent leading-order result obtained from the pion-nucleon sigma term and usually used in theoretical discussions. At higher densities, the higher-order contributions become increasingly important, leading to a hindrance of chiral restoration. Possible reasons for this behaviour are discussed.

引用

页码：118 / 122

页数：5

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