Coupling constants of $D^D_sK$ and $D_s^DK$ processes

preprint2007arXivOpen access

We calculate the coupling constants of $D^*D_sK$ and $D_s^*DK$ vertices using the QCD sum rules technique. We compare results obtained in the limit of SU(4) symmetry and found that the symmetry is broken on the order of 40%.

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Coupling constants of $D^D_sK$ and $D_s^DK$ processes

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Coupling constants of D∗DsKD^*D_sKD∗Ds​K and Ds∗DKD_s^*DKDs∗​DK processes

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Coupling constants of $D^D_sK$ and $D_s^DK$ processes