Factorization breaking of four-quark condensates in the Nambu-Jona-Lasinio model

被引：9

作者：

Braghin, Fabio L. ^{[1
]}

Navarra, Fernando S. ^{[2
]}

机构：

[1] Univ Fed Goias, Inst Fis, BR-74001970 Goiania, Go, Brazil

[2] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 07期

基金：

巴西圣保罗研究基金会;

关键词：

QCD SUM-RULES; VACUUM;

D O I：

10.1103/PhysRevD.91.074008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the factorization hypothesis of the four-quark condensate [q (q) over barq (q) over bar] = A [q (q) over bar](2) by considering the Nambu-Jona-Lasinio model supplemented with sixth- and eighth-order interactions. For that purpose we use the bosonization method with multiple auxiliary variables. We find that in a simplified U(1) version of the model factorization holds, whereas in the full U(3)-flavor version of the model, factorization is broken by terms which are related to the 't Hooft interaction.

引用

页数：11

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