CONSTITUENT QUARK COUPLINGS AND QCD IN THE LARGE N(C) LIMIT

被引：20

作者：

PERIS, S ^{[1
]}

DERAFAEL, E ^{[1
]}

机构：

[1] CNRS MARSEILLE LUMINY, CTR PHYS THEOR, F-13288 MARSEILLE 9, FRANCE

来源：

PHYSICS LETTERS B | 1993年 / 309卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(93)90950-M

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is shown that in the constituent quark model of Georgi-Manohar, the dispersion relation that leads to the Adler-Weisberger sum rule for the axial vector coupling g(A) requires a subtraction constant. This fact explains the discrepancy between the results of different recent estimates of the 1/N(c) corrections to Weinberg's large N(c) result g(A) = 1, where N(c) is the number of QCD colours. We also discuss a possible scenario which shows that g(A) = 1 might not be a necessary consequence of QCD in the large N(c) limit.

引用

页码：389 / 393

页数：5

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