Matching coefficients for improved staggered bilinears

TL;DR

This paper computes one-loop matching factors for improved staggered fermion bilinear operators, showing that various improvement schemes significantly reduce correction sizes, making them comparable to other fermion formulations.

Contribution

It provides a comparative analysis of different improvement schemes' effects on one-loop matching factors for staggered fermions.

Findings

All improvement schemes substantially reduce one-loop contributions.

Corrections are comparable to Wilson and domain-wall fermions.

Different schemes show similar effectiveness in reducing corrections.

Abstract

We calculate one-loop matching factors for bilinear operators composed of improved staggered fermions. We compare the results for different improvement schemes used in the recent literature, including the HYP action and an action close to the Asqtad action. We find that all improvement schemes substantially reduce the size of the one-loop contributions to matching factors. The resulting corrections are comparable to, or smaller than, those found with Wilson and domain-wall fermions.