One-loop corrections to the baryon axial vector current

被引：0
|
作者：
M A HERNÁNDEZ-RUÍZ
机构：
[1] Universidad Autónoma de San Luis Potosí,Instituto de Física
[2] Universidad Autónoma de Zacatecas,Facultad de Ciencias Químicas
来源：
Pramana | 2012年 / 79卷
关键词：
Baryons; 1/; expansions; perturbation theory; 14.20−c; 11.15.Pg; 12.38.Bx;
D O I：
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学科分类号：
摘要：
The symmetry breaking corrections to the pion–baryon couplings vanish to first order in 1/Nc, where Nc is the number of colours. Loop graphs with octet and decuplet intermediate states cancel to various orders in Nc as a consequence of the large-Nc spin-flavour symmetry of QCD baryons. The baryon axial vector current is computed at one-loop order in heavy baryon chiral perturbation theory in the large Nc limit. 1/Nc corrections in the case of gA in QCD are presented here.
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页码：917 / 920
页数：3
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