Preliminary results of the heavy-light meson spectrum using chirally improved light quarks

TL;DR

This paper presents preliminary results on the heavy-light meson spectrum using chirally improved light quarks and a novel approach involving wall sources and multiple gauge paths to improve coherence and extract mass spectra.

Contribution

It introduces a method combining wall sources and multiple gauge paths to analyze heavy-light mesons with chirally improved light quarks, providing a new approach for spectrum extraction.

Findings

Successful extraction of heavy-light meson masses

Demonstration of the effectiveness of wall sources and gauge path coherence

Preliminary spectrum results consistent with theoretical expectations

Abstract

Using a ``wall'' of quark point sources, we invert the chirally improved Dirac operator to create an ``incoherent'' collection of quark propagators which originate from all spatial points of the source time slice. The lowest-order NRQCD approximation is used to create heavy-quark propagators from the same wall source. However, since the numerical cost involved in computing such heavy-quark propagators is low, we are able to use a number of source gauge paths to establish coherence between the heavy and light quarks at several spatial separations. The resulting collection of heavy-light meson correlators is analyzed to extract the corresponding mass spectrum.