First results from 2+1 dynamical quark flavors on an anisotropic lattice: light-hadron spectroscopy and setting the strange-quark mass

TL;DR

This paper reports initial results of light-hadron spectroscopy using $N_f=2+1$ dynamical anisotropic lattices, introducing a new parameterization for quark masses and extrapolating to physical values, with scale setting and algorithm performance analysis.

Contribution

It presents the first light-hadron spectroscopy results on $N_f=2+1$ anisotropic lattices and introduces a new coordinate system for quark mass parameterization.

Findings

Successful extrapolation to physical quark masses.

Measurement of the Sommer scale on these ensembles.

Assessment of hybrid Monte Carlo algorithm performance.

Abstract

We present the first light-hadron spectroscopy on a set of $N_f=2+1$ dynamical, anisotropic lattices. A convenient set of coordinates that parameterize the two-dimensional plane of light and strange-quark masses is introduced. These coordinates are used to extrapolate data obtained at the simulated values of the quark masses to the physical light and strange-quark point. A measurement of the Sommer scale on these ensembles is made, and the performance of the hybrid Monte Carlo algorithm used for generating the ensembles is estimated.