Quark mass dependence of the $D_{s0}^*(2317)$

Abstract

We determine the quark mass dependence - light and heavy - of the $D_{s0}(2317)$ properties, such as, mass, coupling to $DK$, scattering lengths and compositeness, from a global analysis of $DK$ energy levels from LQCD. In particular, we analyze the HSC energy levels for $DK$ scattering in $I=0$ for different boosts and two pion masses. The formalism is based in the local hidden-gauge interaction of Weinberg-Tomozawa type which respects chiral and heavy quark spin symmetries, supplemented by a term that takes into account the $DK$ coupling to a bare $c\bar{s}$ component. The isospin violating decay of the $D_{s0}(2317)\to D_{s}^+\pi^0$ is also evaluated