Hybrid mesons from anisotropic lattice QCD with the clover and improved gauge actions

TL;DR

This paper investigates hybrid mesons using anisotropic lattice QCD with improved actions, demonstrating reduced errors and estimating masses for light quark and charmonium hybrids.

Contribution

First application of improved quark and gluonic actions to hybrid mesons, showing enhanced accuracy in lattice QCD calculations.

Findings

Improved actions reduce lattice spacing errors

Estimated mass of 1^{-+} light quark hybrid

Estimated mass of charmonium hybrid

Abstract

We study hybrid mesons from the clover and improved gauge actions at $\beta=2.6$ on the anisotropic $12^3\times36$ lattice using our PC cluster. We estimate the mass of $1^{-+}$ light quark hybrid as well as the mass of the charmonium hybrid. The improvement of both quark and gluonic actions, first applied to the hybrid mesons, is shown to be more efficient in reducing the lattice spacing and finite volume errors.