and renormalization of quark bilinear operators using overlap fermions
We present the vector, scalar, and tensor renormalization constants (RCs) using overlap fermions with either regularization independent momentum subtraction (RI / MOM) or symmetric momentum subtraction (RI / SMOM) as the intermediate scheme on the lattice with lattice spacings a from 0.04 fm to 0.12 fm. Our gauge field configurations from the MILC and RBC/UKQCD collaborations include sea quarks using either the domain wall or the HISQ action, respectively. The results show that RI / MOM and RI / SMOM can provide consistent renormalization constants to the MS¯ scheme, after proper a2p2 extrapolations. But at p ~ 2 GeV, both RI / MOM and RI / SMOM suffer from nonperturbative effects which cannot be removed by the perturbative matching. The comparison between the results with different sea actions also suggests that the renormalization constant is discernibly sensitive to the lattice spacing but not to the bare gauge coupling in the gauge action.
- Research Organization:
- Univ. of Kentucky, Lexington, KY (United States)
- Sponsoring Organization:
- USDOE; Strategic Priority Research Program of Chinese Academy of Sciences; NSFC; NSFC-DFG; National Science Foundation (NSF)
- Contributing Organization:
- χQCD Collaboration
- Grant/Contract Number:
- AC05-00OR22725; SC0013065; AC05-06OR23177; ACI-1053575; XDB34030303; XDPB15; 12047503; 12061131006
- OSTI ID:
- 1906541
- Alternate ID(s):
- OSTI ID: 1958138
- Report Number(s):
- DOE-UKY-13065-2204.09246; PRVDAQ; 114506
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Vol. 106 Journal Issue: 11; ISSN 2470-0010
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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