Hadron Spectrum and Matrix Elements in QCD with Dynamical Wilson Fermions at 6/g^2=5.3

TL;DR

This paper reports lattice QCD simulations with dynamical Wilson fermions at specific parameters, analyzing hadron masses and decay constants, and finding minimal sea quark effects on these quantities.

Contribution

First detailed study of hadron spectrum and matrix elements in QCD with dynamical Wilson fermions at this coupling and quark masses.

Findings

Sea quark effects on matrix elements are small.

Calculated masses and decay constants for vector mesons and pseudoscalars.

Included D-meson decay constant in analysis.

Abstract

We present results of a lattice simulation of quantum chromodynamics with two degenerate flavors of dynamic Wilson fermions at $6/g^2=5.3$ at each of two dynamical fermion hopping parameters, $\kappa=0.1670$ and 0.1675, corresponding to pion masses in lattice units of about 0.45 and 0.31. The simulations include three other values of valence quark mass, in addition to the dynamical quarks. We present calculations of masses and of the decay constants of vector mesons and of pseudoscalars, including the D-meson decay constant. The effects of sea quarks on matrix elements and spectroscopy are small.