Determination of c_sw in N_f=3+1 Lattice QCD with massive Wilson fermions
Patrick Fritzsch, Rainer Sommer, Felix Stollenwerk, Ulli Wolff
TL;DR
This paper presents a non-perturbative method to determine the O(a)-improvement coefficient c_sw for Wilson fermions with massive sea quarks in N_f=3+1 lattice QCD, using the Schrödinger functional and a line of constant physics near the charm quark mass.
Contribution
It introduces a strategy to accurately compute c_sw non-perturbatively for massive Wilson fermions in N_f=3+1 lattice QCD, improving lattice QCD simulations.
Findings
Successful implementation of the improvement condition via the PCAC relation.
Application of the method with the tree-level improved Lüscher-Weisz gauge action.
Determination of c_sw near the charm quark mass region.
Abstract
We develop a strategy for the non-perturbative determination of the O(a)-improvement coefficient c_sw for Wilson fermions with massive sea quarks. The improvement condition is defined via the PCAC relation in the Schr\"odinger functional. It is imposed along a line of constant physics designed to be close to the correct mass of the charm quark. The numerical work uses the tree-level improved L\"uscher-Weisz gauge action in N_f=3+1 Lattice QCD.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research