One loop matching factors for staggered bilinear operators with improved glue

TL;DR

This paper computes one-loop matching factors for HYP-smeared staggered bilinear operators using an improved gluon propagator, enhancing the accuracy of lattice QCD simulations.

Contribution

It introduces the use of the Symanzik-improved gluon propagator in calculating matching factors for HYP-smeared staggered fermions, extending previous work.

Findings

Matching factors calculated perturbatively at one-loop order.

Improved gluon propagator reduces one-loop corrections.

Results applicable to MILC collaboration configurations.

Abstract

We present results for matching factors for bilinear operators composed of HYP-smeared staggered fermions and constructed using HYP-smeared fat links. The matching factors are calculated perturbatively at one-loop order. The new feature of our calculation compared to previous work on HYP-smeared staggered fermions is the use of the Symanzik-improved gluon propagator, which allows our results to be applied to our ongoing simulations based on configurations generated by the MILC collaboration. We address the issue of the relative efficiency of various improvement schemes in reducing one-loop corrections to the matching factors.