Renormalization of quark bilinear operators in a momentum-subtraction scheme with a nonexceptional subtraction point

Renormalization of quark bilinear operators in a MOM-scheme with a non-exceptional subtraction point

We extend the Rome-Southampton RI/MOM renormalization scheme for bilinear operators to one with a non-exceptional, symmetric subtraction point. Two-point Green’s function with the insertion of quark bilinear operators are computed with scalar, pseudo-scalar, vector, axial-vector and tensor operators at one-loop order in perturbative QCD. Conversion factors are derived, which connect this RI/SMO...

Matching the quasiparton distribution in a momentum subtraction scheme

A momentum subtraction scheme for two–nucleon effective field theory

We introduce a momentum subtraction scheme which obeys the power counting of Kaplan, Savage, and Wise (KSW), developed for systems with large scattering lengths, a. Unlike the power divergence subtraction scheme, coupling constants in this scheme obey the KSW scaling for all μR > 1/a. We comment on the low-energy theorems derived by Cohen and Hansen. We conclude that there is no obstruction to ...

Precise MSbar light-quark masses from lattice QCD in the regularization invariant symmetric momentum-subtraction scheme

(2010) Precise MSbar light-quark masses from lattice QCD in the regularization invariant symmetric momentum-subtraction scheme. This document is made available in accordance with publisher policies and may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the URL above for details on acce...

PreciseMS light-quark masses from lattice QCD in the regularization invariant symmetric momentum-subtraction scheme

We compute the conversion factors needed to obtain theMS and renormalization-group-invariant (RGI) up, down, and strange quark masses at next-to-next-to-leading order from the corresponding parameters renormalized in the recently proposed RI/SMOM and RI=SMOM renormalization schemes. This is important for obtaining the MS masses with the best possible precision from numerical lattice QCD simulat...