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 N c limit. 1/N c corrections in the case of g A in QCD are presented here.
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HERNÁNDEZ-RUÍZ, M.A. One-loop corrections to the baryon axial vector current. Pramana - J Phys 79, 917–920 (2012). https://doi.org/10.1007/s12043-012-0406-2
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DOI: https://doi.org/10.1007/s12043-012-0406-2