Vector and axial-vector couplings of D and D* mesons in 2+1 flavor Lattice QCD

TL;DR

This paper uses 2+1 flavor Lattice QCD to compute the axial-vector couplings, electromagnetic form factors, and charge radii of D and D* mesons, providing insights into charm hadron interactions.

Contribution

It presents the first lattice QCD calculations of D and D* meson couplings and charge radii, including separate light and charm quark contributions.

Findings

Calculated D*Dπ, DDρ, D*D*ρ coupling constants.

Extracted charge radii of D and D* mesons.

Separated light and charm quark contributions.

Abstract

Using the axial-vector coupling and the electromagnetic form factors of the D and D* mesons in 2+1 flavor Lattice QCD, we compute the D*D\pi, DD\rho and D*D*\rho coupling constants, which play an important role in describing the charm hadron interactions in terms of meson-exchange models. We also extract the charge radii of D and D* mesons and determine the contributions of the light and charm quarks separately.