Interpretation of D${}_{sJ}^{\ast }$(2317) and D${}_{sJ}$(2460)

Abstract

The experimental status of the recently observed resonances which could be interpreted as c$\bar{q}$ mesons with s${}_l^P={1/2}^{+}$ is reviewed. In the framework of HQET and chiral perturbation theory, strong and radiative widths of these states are computed in the hypothesis that they are c$\bar{q}$ states, obtaining results consistent with the experimental measurements. Masses and widths for the analogous states containing a beauty quark are also predicted.

Latex, 12 pages, 10 eps figures. Talk given at IFAE Conference, Torino, April 14-16, 2004