Decay properties of new D-mesons
Petersburg Nuclear Physics Institute, 188300, St.Petersburg, Russia
2 Institute for Theoretical Physics II, Ruhr University, 44801, Bochum, Germany
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We consider radiative and pionic decays of the new D s -mesons in the framework of a phenomenologically motivated approach. Present data on ratios of the two kinds of decays can be described without explicitly using a 4-quark component. Most probably, the isospin violation in decays of different D s -mesons is not universal, and the binding potential should be different from Coulombic. New precise measurements may provide further clarification for the nature of the D s excited states.
© Società Italiana di Fisica and Springer-Verlag, 2004