First results with two light flavours of quarks with maximally twisted mass

TL;DR

This paper presents initial lattice QCD simulation results with two light quark flavors using twisted mass formulation, demonstrating small scaling violations and exploring extensions to more flavors.

Contribution

First results of lattice QCD simulations with two degenerate light quark flavors using maximally twisted mass formulation, showing promising scaling behavior and potential for further studies.

Findings

Pseudo-scalar masses below 300 MeV achieved

Scaling violations in decay constant are small

Exploratory results for N_f=2+1+1 flavors discussed

Abstract

We report on first results of an ongoing effort to simulate lattice QCD with two degenerate flavours of quarks by means of the twisted mass formulation tuned to maximal twist. By utilising recent improvements of the HMC algorithm, pseudo-scalar masses well below 300 MeV are simulated on volumes with spatial size larger than 2 fm at values of the lattice spacing similar or smaller than 0.1 fm. We present first evidence that scaling violations in the pseudo-scalar decay constant are small and well compatible with O(a) improvement. Additionally, exploratory results for the case of N_f=2+1+1 flavours are discussed.