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 $D_{sJ}^{\ast }(2317)\to D_s^{\ast }\gamma$ and $D_{sJ}(2460)\to D_s^{(\ast )}\gamma ,D_{sJ}^{\ast }(2317)\gamma$ 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 $D_{sJ}^{\ast }(2317)\to D_s^{\ast }\gamma$ 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

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• Testing the molecular nature of ${\mathbf{D}}_{\mathbf{s}0}^{\ast }(2317)$ and ${\mathbf{D}}_0^{\ast }(2400)$ in semileptonic ${\mathbf{B}}_{\mathbf{s}}$ and $\mathbf{B}$ decays
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• Semileptonic $B_c^{-}\to D^{\ast 0}\ell \nu$ transition in three--point QCD sum rules and HQET with gluon condensate corrections
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