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Heavy-hadron chiral perturbation theory (HH$\chi$PT) is applied to the decaysof the even-parity charmed strange mesons, D_{s0}(2317) and D_{s1}(2460).Heavy-quark spin symmetry predicts the branching fractions for the threeelectromagnetic decays of these states to the ground states D_s and D_s^* interms of a single parameter. The resulting predictions for two of the branchingfractions are significantly higher than current upper limits from the CLEOexperiment. Leading corrections to the branching ratios from chiral loopdiagrams and spin-symmetry violating operators in the HH$\chi$PT Lagrangian cannaturally account for this discrepancy. Finally the proposal that theD_{s0}(2317) (D_{s1}(2460)) is a hadronic bound state of a D (D^*) meson and akaon is considered. Leading order predictions for electromagnetic branchingratios in this molecular scenario are in very poor agreement with existingdata.Comment: 25 pages, 3 figure

Heavy-quark symmetry and the electromagnetic decays of excited charmed strange mesons