One-loop corrections to the baryon axial vector current |
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| Authors: | M A HERNáNDEZ-RUíZ |
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| Institution: | 1. Instituto de F??sica, Universidad Aut??noma de San Luis Potos??, Av. Manuel Nava 6 Zona Universitaria, 78290, San Luis Potos??, SLP, M??xico
2. Facultad de Ciencias Qu??micas, Universidad Aut??noma de Zacatecas, Apartado Postal 585, 98060, Zacatecas, M??xico
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| Abstract: | The symmetry breaking corrections to the pion?Cbaryon 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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