Renormalisation of lattice currents and the calculation of decay constants for dynamical staggered fermions

TL;DR

This paper presents a numerical study of renormalisation constants for lattice staggered fermions, revealing significant non-perturbative effects and estimating the vector decay constant $f_\rho$ for dynamical simulations.

Contribution

It provides the first non-perturbative calculation of lattice staggered renormalisation constants at specific parameters, improving accuracy in decay constant estimations.

Findings

Significant non-perturbative effects observed in renormalisation constants

Estimated the vector decay constant $f_\rho$ from lattice data

Provided data at $\beta=5.35$, $m=0.01$ for future studies

Abstract

A numerical calculation of the lattice staggered renormalisation constants at $\beta = 5.35$, $m = 0.01$ is presented. It is seen that there are considerable non-perturbative effects present. As an application the vector decay constant $f_\rho$ is estimated. (LAT92 contribution, one LATEX file with 3 postscript figures appended.)