Excited meson spectroscopy with chirally improved fermions

TL;DR

This paper reports on the calculation of excited meson masses using chirally improved fermions in quenched lattice QCD, employing a diverse set of operators to better capture radial excitations.

Contribution

It introduces a novel approach with a matrix of correlators and varied spatial sources to enhance the detection of excited states in meson spectroscopy.

Findings

Successful extraction of excited meson masses at pion masses down to 350 MeV.

Improved overlap with radial excitations through diverse operator basis.

Enhanced methodology for future meson spectroscopy studies.

Abstract

We present excited meson masses from quenched calculations using chirally improved (CI) quarks at pion masses down to 350 MeV. The salient features of our analysis are the use of a matrix of correlators from various source and sink operators and a basis which includes quark sources with different spatial widths, thereby improving overlap with states exhibiting radial excitations.