Open-charm meson systems in the hadrogenesis conjecture

We study the spectrum and isospin-violating strong decays of charmed mesons with strangeness. The scalar D s 0 ∗ ( 2317 ) ± and the axial-vector D s 1 ∗ ( 2460 ) ± states are generated by coupled-channel dynamics based on the leading order chiral Lagrangian. The effect of chiral corrections is investigated. We show that taking into account large- N c relations implies a measurable signal for an exotic axial-vector state in the η D ∗ invariant mass distribution. The hadronic decay widths of the scalar D s 0 ∗ ( 2317 ) ± and the axial-vector D s 1 ∗ ( 2460 ) ± are predicted to be 140 keV.