Goldstone theorem and diquark confinement beyond rainbow-ladder approximation

被引：337

作者：

Bender, A

Roberts, CD

vonSmekal, L

机构：

[1] Physics Division, Bldg. 203, Argonne National Laboratory, Argonne

来源：

PHYSICS LETTERS B | 1996年 / 380卷 / 1-2期

关键词：

hadron spectroscopy; confinement; Dyson-Schwinger equations; Bethe-Salpeter equation; nonperturbative QCD phenomenology;

D O I：

10.1016/0370-2693(96)00372-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The quark Dyson-Schwinger equation and meson Bethe-Salpeter equation are studied in a truncation scheme that extends the rainbow-ladder approximation such that, in the chiral limit, the isovector, pseudoscalar meson remains massless. Repulsive contributions, which appear at higher order in the Bethe-Salpeter kernel, eliminate the bound state pole in the quark-quark (diquark) channel that is present in rainbow-ladder approximation. The net effect of higher order terms on the meson bound state masses is small.

引用

页码：7 / 12

页数：6

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