THE STRUCTURE OF THE RHO-MESON IN A NAMBU-JONA-LASINIO APPROACH BEYOND THE MEAN-FIELD APPROXIMATION

被引：10

作者：

KREWALD, S ^{[1
]}

NAKAYAMA, K ^{[1
]}

SPETH, J ^{[1
]}

机构：

[1] UNIV GEORGIA, DEPT PHYS & ASTRON, ATHENS, GA 30602 USA

来源：

PHYSICS LETTERS B | 1991年 / 272卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(91)91818-G

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The interpretation of mesons as pure qqBAR-states suggested by the Nambu-Jona-Lasinio model at the Hartree level is criticised. An extension of the model beyond the mean-field approximation is suggested for the vector-isovector channel. In the vicinity of the rho-meson pole, the quark-antiquark contribution to the total polarization of the vacuum is found to be less than 50%.

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页码：190 / 195

页数：6

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