Symanzik improvement of lattice QCD with four flavors of Wilson quarks
Fatih Tekin, Rainer Sommer, Ulli Wolff
TL;DR
This paper non-perturbatively determines the O(a)-improvement coefficient c_sw for four-flavor Wilson quarks in lattice QCD, enhancing the accuracy of simulations by reducing discretization errors.
Contribution
It provides a new non-perturbative calculation of c_sw for four-flavor Wilson quarks, improving lattice QCD precision.
Findings
Determined c_sw for beta >= 5
Fitted data with Pade approximations for stability
Small extrapolation below beta=5 is feasible
Abstract
We have determined the non-perturbative O(a)-improvement coefficient c_sw for four flavors of Wilson quarks with the plaquette gauge action in a range of beta >= 5. The data are fitted with several Pade approximation formulae to get an impression of the stability. A small extrapolation below beta=5 seems acceptable.
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