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

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.

Comments: 19 pages, 3 figures; added references and comments, published version