Radiative transitions of $D_{sJ}^{\ast }(2317)$ and $D_{sJ}(2460)$

Abstract

We study radiative decays of $D_{sJ}^{\ast }(2317)$ and $D_{sJ}(2460)$ using light-cone QCD sum rules. In particular, we consider the decay modes $D_{sJ}^{\ast }(2317)\to D_s^{\ast }{\hat{I}}^3$ and $D_{sJ}(2460)\to D_s^{(\ast )}{\hat{I}}^3,D_{sJ}^{\ast }(2317){\hat{I}}^3$ and evaluate the hadronic parameters in the transition amplitudes analyzing correlation functions of scalar, pseudoscalar, vector and axial-vector quark currents. In the case of $D_{sJ}^{\ast }(2317)\to D_s^{\ast }{\hat{I}}^3$ we also consider determinations based on two different correlation functions in HQET. The decay widths turn out to be different than previous estimates obtained by other methods; the results favour the interpretation of $D_{sJ}^{\ast }(2317)$ and $D_{sJ}(2460)$ as ordinary $\bar{c}s$ mesons.

RevTex, 23 pages, 9 eps figures