The Charmed-Strange Meson Spectrum

Mesons with valence-quark content \begin{figure}[htbp] \centerline{\includegraphics[width=0.17in,height=0.20in]{141020151.eps}} \label{fig1} \end{figure} (or \begin{figure}[htbp] \centerline{\includegraphics[width=0.16in,height=0.17in]{141020152.eps}} \label{fig2} \end{figure} ) are considered in a quark potential-model approach, particularly in light of the states reported at 2860 MeV.$^{\mathrm{1}}$ The charmed-strange meson system, with its heavy charmed quark and with no truly light valence quarks (that is, no $u$ or $d$ quarks), is a useful system in which to study effective quark potentials. Distinctive features included in this work are a variable mix of Lorentz vector and Lorentz scalar in the confining potential and anomalous magnetic moments for the constituent quarks. Coupling to the four-quark sector is also considered. Model calculations of the masses of all known $D_{s}$ mesons will be presented and preliminary work on the strong decays of states above OZI threshold will be discussed. $^{\mathrm{1}}$LHCb Collaboration, R. Aaij \textit{et al., Observation of overlapping spin-1 and spin-3 } \begin{figure}[htbp] \centerline{\includegraphics[width=0.40in,height=0.23in]{141020153.eps}} \label{fig3} \end{figure} \textit{resonances at mass 2.86 GeV/c}$^{2}$, Phys. Rev. Lett. \textbf{113}. 162001 (2014)