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    • One-loop corrections to the baryon axial vector current

      M A Hernández-Ruíz

      Poster Presentations Volume 79 Issue 4 October 2012 pp 917-920

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/079/04/0917-0920

    • Keywords

       

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

    • Abstract

       

      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.

    • Author Affiliations

       

      M A Hernández-Ruíz1 2

      1. Instituto de Física, Universidad Autónoma de San Luis Potosí, Av. Manuel Nava 6 Zona Universitaria 78290, San Luis Potosí SLP, México
      2. Facultad de Ciencias Químicas, Universidad Autónoma de Zacatecas, Apartado Postal 585, 98060, Zacatecas, México

    • Dates

       
      Published
      October 2012

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