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 calculate one-loop renormalization factors of bilinear quark operators forgluon action including six-link loops and $O(a)$-improved quark action in thelimit of massless quark. We find that finite parts of one-loop coefficients ofrenormalization factors diminish monotonically as either of the coefficients$c_1$ or $c_2+c_3$ of the six-link terms are decreased below zero. Detailednumerical results are given, for general values of the clover coefficient, forthe tree-level improved gluon action in the Symanzik approach $(c_1=-1/12,c_2=c_3=0)$ and for the choices suggested by Wilson $(c_1=-0.252, c_2=0,c_3=-0.17)$ and by Iwasaki $(c_1=-0.331, c_2=c_3=0$ and $c_1=-0.27,c_2+c_3=-0.04)$ from renormalization-group analyses. Compared with the case ofthe standard plaquette gluon action, finite parts of one-loop coefficients arereduced by 10--20% for the Symanzik action, and approximately by a factor twofor the renormalization-group improved gluon actions.Comment: 19 pages, REVTeX, with 3 epsf figure

Perturbative renormalization factors of bilinear quark operators for improved gluon and quark actions in lattice QCD