Excited mesons from $N_f=2$ dynamical Clover Wilson lattices

TL;DR

This paper investigates excited meson states using lattice QCD with $N_f=2$ dynamical Clover Wilson fermions, employing variational methods and specialized quark sources to extract spectral information.

Contribution

It introduces a method to extract excited meson states on the lattice using diverse quark sources and the variational approach with dynamical Clover Wilson fermions.

Findings

Preliminary results for pseudoscalar, scalar, vector, and pseudovector mesons.

Use of multiple spatial smearings to improve excited state extraction.

Application of the variational method to lattice QCD data.

Abstract

We study mesons on the lattice with a special focus on excited states. For that purpose we construct several quark sources with different spatial smearings, including p-waves. These quark sources are then combined with the appropiate Dirac structures to form meson interpolators of definite spin. We use these operators to construct a cross correlation matrix from which we extract ground and excited meson states using the variational method. For the calculations we use gauge configurations with $N_f=2$ dynamical Clover Wilson fermions provided by the CP-PACS collaboration. We show preliminary results for pseudoscalar, scalar, vector and pseudovector mesons.