Finite-Size Effect of Hadron Masses with Kogut-Susskind Quarks

TL;DR

This paper investigates how finite lattice sizes affect hadron mass calculations in QCD, highlighting larger effects in full QCD due to sea quarks and emphasizing their significance even at large lattice sizes.

Contribution

It provides numerical analysis of finite-size effects on hadron masses in quenched and full QCD, revealing larger effects in the presence of dynamical sea quarks.

Findings

Finite-size effects are larger in full QCD due to sea quarks.

Finite-size effects remain significant even at large lattice sizes.

Finite-size effects are non-negligible at small quark masses.

Abstract

We present numerical results and their analyses of finite-size effects of hadron masses for both quenched and full QCD calculations. We show that they are much larger for full QCD due to dynamical sea quarks and the associated breaking of $Z(3)$ symmetry. We also argue that finite-size effects are non-negligible even for the largest lattice size simulation currently being made for a very small quark mass. (talk at lattice93)