D_{sJ}(2860) as the first radial excitation of the D_{s0}^*(2317)

Abstract

A coupled-channel model previously employed to describe the narrow $D_{s0}^{\ast }$(2317) and broad $D_0^{\ast }$(2400) charmed scalar mesons is generalized so as to include all ground-state pseudoscalar-pseudoscalar and vector-vector two-meson channels. All parameters are chosen fixed at published values, except for the overall coupling constant, which is fine-tuned to reproduce the $D_{s0}^{\ast }$(2317) mass. Thus, the radial excitations $D_{s0}^{\ast }$(2850) and $D_0^{\ast }$(2740) are predicted, both with a width of about 50 MeV. The former state appears to correspond to the new $D_{sJ}$(2860) resonance decaying to $DK$ announced by BABAR in the course of this work. Also the $D_0^{\ast }$(2400) resonance is roughly reproduced, though perhaps with a somewhat too low central resonance peak.

Plain LaTeX, 4 pages, 2 Postscript figures; v2: REVTeX, 4 pages, introduction expanded, "Note added in proof" and references added, figures with more detail and improved quality, version accepted for publication in Physical Review Letters

References in corpus (3)

• The nature of $\sigma$, $\kappa$, $a_0(980)$ and $f_0(980)$
• $D_{sJ}(2860)$ resonance and the $s_{\ell }^P={\frac{5}{2}}^{-}$ $c\bar{s}$ ($c\bar{q}$) doublet
• Coupling constants and transition potentials for hadronic decay modes of a meson

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• Study of meson properties in quark models (Ph.D. Thesis, University of Pittsburgh, October 2006)