Study of the $D^{\ast }\rho$ system using QCD sum rules

In this talk I present a study of the $D^{\ast }\rho$ system made by using the method of QCD sum rules. Considering isospin and spin projectors, we investigate the different configurations and obtain three $D^{\ast }$ mesons with isospin $I=1\mathrm{/}2$, spin $S=0$, $1$, $2$ and with masses $2500\pm 67$ MeV, $2523\pm 60$ MeV, and $2439\pm 119$ MeV, respectively. The last state can be related to $D_2^{\ast }(2460)$ (spin 2) listed by the Particle Data Group, while one of the first two might be associated with $D^{\ast }(2640)$, whose spin-parity is unknown. In the case of $I=3\mathrm{/}2$ we also find evidences of three states with spin 0, 1 and 2, respectively, with masses $2467\pm 82$ MeV, $2420\pm 128$ MeV, and $2550\pm 56$ MeV.