Excited meson spectroscopy with two chirally improved quarks

TL;DR

This study investigates the excited isovector meson spectrum using chirally improved quarks, providing results that largely agree with experimental data and exploring strange mesons with partially quenched s-quarks.

Contribution

It introduces a lattice QCD approach with chirally improved quarks to analyze excited meson states and performs extrapolations to the physical point.

Findings

Most results agree with experimental data

Seven ensembles with pion masses down to 250 MeV used

Excited states extracted using the variational method

Abstract

The excited isovector meson spectrum is explored using two chirally improved dynamical quarks. Seven ensembles, with pion masses down to \approx 250 MeV are discussed and used for extrapolations to the physical point. Strange mesons are investigated using partially quenched s-quarks. Using the variational method, we extract excited states in several channels and most of the results are in good agreement with experiment.