Speaker
Prof.
Ming Gong
(Institute of High Energy Physics, CAS)
Description
We report a quark spin calculation from the anomalous Ward identity with overlap fermions on 2+1 flavor dynamical fermion configurations. Such a formulation decomposes the divergence of the flavor-singlet axial-vector current into a quark pseudoscalar term and a triangle anomaly term, flavor by flavor. We use the overlap fermion for the valence and the quark loop so that the renormalization constants Zm and ZP cancel in the pseudoscalar operator 2mP. In addition, the overlap Dirac operator is used to calculate the local topological charge in the anomaly so that there is no renormalization for the anomaly term either.
Primary author
Prof.
Ming Gong
(Institute of High Energy Physics, CAS)
Co-authors
Prof.
Keh-Fei Liu
(University of Kentucky)
Dr
yibo Yang
(University of kentucky)
