Light hadron spectrum with two flavors of $O(a)$ improved dynamical quarks : final results from JLQCD

TL;DR

This paper reports final results from JLQCD on the light hadron spectrum and quark masses using two-flavor dynamical quarks with $O(a)$ improvement, showing sea quark effects improve agreement with experimental data.

Contribution

It provides the first comprehensive analysis of the light hadron spectrum with fully $O(a)$-improved Wilson quarks and two dynamical flavors, highlighting sea quark effects.

Findings

Sea quark effects improve agreement with experimental hadron masses.

Quark masses are reduced by about 25%.

Results support the effectiveness of $O(a)$-improved Wilson quarks in spectrum calculations.

Abstract

We present the final results of the JLQCD calculation of the light hadron spectrum and quark masses with two flavors of dynamical quarks using the plaquette gauge action and fully $O(a)$-improved Wilson quark action at $\beta=5.2$. We observe that sea quark effects lead to a closer agreement of the strange meson and baryon masses with experiment and a reduction of quark masses by about 25.