High statistics calculations of quenched QCD spectrum using various quark sources

TL;DR

This study computes the hadron spectrum in quenched QCD using various quark sources, demonstrating consistent ground state masses across sources and approximate excited state masses, contributing to lattice QCD spectral analysis.

Contribution

It compares different quark sources in quenched QCD to evaluate their effectiveness in spectrum calculations, a novel approach in this context.

Findings

Ground state masses agree across source types

Excited state masses are consistent with experimental data within errors

Different sources yield similar results for ground states

Abstract

We present the results for the hadron spectrum calculated on 400 configurations using point source, wall source and 8-cubic sources, in quenched QCD with Wilson fermions at $\beta=6.0$ and $K=0.155$ on a $24^3 \times 54$ lattice. The results for the ground state masses obtained with three types of quark sources agree well with each other. Masses of the first excited states appear consistent with experimental values within large errors.