English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We extend the Rome-Southampton regularization independentmomentum-subtraction renormalization scheme(RI/MOM) for bilinear operators toone with a nonexceptional, symmetric subtraction point. Two-point Green'sfunctions with the insertion of quark bilinear operators are computed withscalar, pseudoscalar, vector, axial-vector and tensor operators at one-looporder in perturbative QCD. We call this new scheme RI/SMOM, where the S standsfor "symmetric". Conversion factors are derived, which connect the RI/SMOMscheme and the MSbar scheme and can be used to convert results obtained inlattice calculations into the MSbar scheme. Such a symmetric subtraction pointinvolves nonexceptional momenta implying a lattice calculation withsubstantially suppressed contamination from infrared effects. Further, we findthat the size of the one-loop corrections for these infrared improvedkinematics is substantially decreased in the case of the pseudoscalar andscalar operator, suggesting a much better behaved perturbative series.Therefore it should allow us to reduce the error in the determination of thequark mass appreciably.

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