One-loop corrections to the baryon axial vector current

Pramana

M A Hernández-Ruíz1 2¹ 

[1] Instituto de Física, Universidad Autónoma de San Luis Potosí, Av. Manuel Nava 6 Zona Universitaria 78290, San Luis Potosí SLP, México$$

关键词: Baryons;    $1/N_{c}$ expansions;    perturbation theory.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The symmetry breaking corrections to the pion–baryon couplings vanish to first order in $1/N_{c}$, where $N_{c}$ is the number of colours. Loop graphs with octet and decuplet intermediate states cancel to various orders in $N_{c}$ as a consequence of the large-$N_{c}$ 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. $1/N_{c}$ corrections in the case of $g_{A}$ in QCD are presented here.

【 授权许可】

Unknown