Factorization and non-factorization of in-medium four-quark condensates

被引：20
|
作者：
Leupold, S [1 ]
机构：
[1] Univ Giessen, Inst Theoret Phys, D-35390 Giessen, Germany
来源：
PHYSICS LETTERS B | 2005年 / 616卷 / 3-4期
关键词：
QCD sum rules; large-N-c expansion; nuclear matter; finite-temperature field theory;
D O I：
10.1016/j.physletb.2005.04.046
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
It is well-established for the vacuum case that in the limit of a large number of colors N-c the four-quark condensates factorize into products of the two-quark condensate. It is shown that in the combined large-N-c and linear-density approximation four-quark condensates do not factorize in a medium of pions (finite-temperature system) but do factorize in a medium of nucleons (nuclear system). (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：203 / 207
页数：5
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