Light hadron spectroscopy with two flavors of O(a) improved dynamical quarks

TL;DR

This study investigates the light hadron spectrum and quark masses in two-flavor QCD using improved Wilson quarks, revealing sea quark effects by comparing with quenched QCD results.

Contribution

First detailed analysis of light hadron spectrum with two dynamical flavors using non-perturbative O(a) improved Wilson quarks.

Findings

Sea quark effects observed in meson and quark masses.

Simulations conducted at multiple lattice sizes and sea quark masses.

Comparison with quenched QCD highlights the impact of dynamical quarks.

Abstract

We report on our study of light hadron spectrum and quark masses in QCD with two flavors of dynamical quarks. Simulations are made with the plaquette gauge action and the non-perturbatively $O(a)$ improved Wilson quark action. We simulate 5 sea qaurk masses corresponding to $m_{PS}/m_{V} \simeq 0.8$--0.6 at $\beta=5.2$ on $12^3 \times 48$, $16^3 \times 48$ and $20^3 \times 48$ lattices. A comparison with previous calculations in quenched QCD indicates sea quark effects in meson and quark masses.