Axial Vector Couplings of the Nucleon in Chiral Quark Model Incorporating U(1)_A Anomaly Effects
classification
✦ hep-ph
keywords
quarkanomalyaxialchiralcurrentseffectsmodelnucleon
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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 effects. The polarized strage quark sea in the polarized nucleon results from different renormalization of the flavor singlet and octet currents and is in reasonable agreement with the experiment.
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