PoS - Proceedings of Science
Volume 396 - The 38th International Symposium on Lattice Field Theory (LATTICE2021) - Oral presentation
Renormalization constants of overlap quark bilinear operators from RI/MOM and RI/SMOM scheme
F. He and Y.B. Yang*
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Pre-published on: May 16, 2022
Published on:
Abstract
We calculate the renormalization constants (RCs) of vector, axial, vector scalar, pseudoscalar and tensor quark operators of the overlap valence fermion, on the 11 gauge ensembles with dynamical fermion using either Domain wall fermion~(DWF) action or
Highly improved stagger quark~(HISQ) action at lattice spacings from 0.04 fm to 0.20 fm. We find the results under the $\overline{\textrm{MS}}$ scheme using either the RI/MOM or RI/SMOM scheme are consistent with each other, once the proper $a^2p^2$ extrapolation is applied and the systematic uncertainties are estimated cautiously.
Our results with different gauge and fermion actions also indicate that the RCs
are majorly dependent on the lattice spacing (as the inverse of UV cut-off) rather than the bare gauge coupling used by the gauge action.
DOI: https://doi.org/10.22323/1.396.0610
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