The coupled-channel analysis of the D and Ds mesons
Abstract
The shift of the p-wave Ds meson mass due to coupling to the DK channel is calculated without fitting parameters using the chiral Lagrangian. As a result the original Q q mass 2.490 MeV generically calculated in the relativistic quark models is shifted down to the experimental value 2317 MeV. With the same Lagrangian the shift of the radial excited 1- level is much smaller, while the total width > 100 MeV and the width ratio is in contradiction with the D*(2632) state observed by SELEX group.
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