Heavy-light charm mesons spectroscopy and decay widths

TL;DR

This paper develops a mass formula for heavy-light charm mesons using heavy quark effective theory, incorporating finite mass corrections, and fits the parameters to experimental decay widths to improve theoretical predictions.

Contribution

It introduces a new mass formula for charm mesons that includes finite mass corrections and estimates strong coupling constants by fitting to decay data.

Findings

Masses fitted to experimental decay widths

Estimated strong coupling constants g, h, g'

Improved agreement with experimental data

Abstract

We present the mass formula for heavy-light charm meson for one loop, using heavy quark effective theory. Formulating an effective Lagrangian, the masses of the ground state heavy mesons have been studied in the heavy quark limit including leading corrections from finite heavy quark masses and nonzero light quark masses using a constrained fit for the eight equation having eleven parameters including three coupling constants g, h and g'. Masses determined from this approach is fitted to the experimentally known decay widths to estimate the strong coupling constants, showing a better match with available theoretical and experimental data