Axial Vector Couplings of the Nucleon in Chiral Quark Model Incorporating $U(1{)}_A$ Anomaly Effects

Xiaoyuan Li, Yi Liao

Renormalization of the axial vector currents due to Goldstone loops is studied in a simple extension of Manohar - Georgi chiral quark model which incorporates $U(1{)}_A$ anomaly effe…