Hadron spectroscopy of twisted mass lattice QCD at beta = 6.0

TL;DR

This paper demonstrates that twisted mass lattice QCD with the clover action enables simulations at lower quark masses than traditional methods, overcoming limitations caused by exceptional configurations.

Contribution

It introduces the use of twisted mass clover action in quenched QCD to reach lower quark masses, improving simulation capabilities.

Findings

Twisted mass clover action allows simulations at lower quark masses.

Overcomes limitations of exceptional configurations in quenched QCD.

Enables more precise hadron spectroscopy studies.

Abstract

Simulations that use the clover action in quenched QCD calculations have a lower limit to the quark mass that can be reached, because of the fluctuations caused by exceptional configurations. From this low statistics study, we find that the twisted clover action, recently introduced by the ALPHA collaboration, can be used to simulate quenched QCD at quark masses below those attainable by simulations that use the clover action.