Non-perturbative Renormalization of Bilinear Operators with Improved Staggered Quarks

Abstract

We present renormalization factors for the bilinear operators obtained using the non-perturbative renormalization method (NPR) in the RI-MOM scheme with improved staggered fermions on the MILC asqtad lattices ($N_f=2+1$). We use the MILC coarse ensembles with $20^3\times 64$ geometry and $a{m}_{\ell }/a{m}_s=0.01/0.05$. We obtain the wave function renormalization factor $Z_q$ from the conserved vector current and the mass renormalization factor $Z_m$ from the scalar bilinear operator. We also present preliminary results of renormalization factors for other bilinear operators.

Comments: 7 pages, 4 figures, Lattice 2013 Proceeding