Derivative sources in lattice spectroscopy of excited light-quark mesons

TL;DR

This paper develops and tests new interpolating fields for lattice spectroscopy of excited light-quark mesons, improving the ability to study these particles in lattice QCD simulations.

Contribution

It introduces covariant derivative-based interpolators for mesons and demonstrates their effectiveness in quenched lattice calculations of excited states.

Findings

Successful construction of interpolators for various meson types.

Effective identification of excited meson states using the new interpolators.

Validation of the approach in quenched lattice QCD calculations.

Abstract

We construct efficient interpolating fields for lattice spectroscopy of mesons by applying covariant derivatives on Jacobi smeared quark sources. These interpolators are tested in a quenched calculation of excited mesons based on the variational method. We present results for pseudoscalar, scalar, vector and pseudovector mesons.