Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach

Details Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach

2006-03-09

arxiv.org/abs/hep-ph/0603072v4

Phys.Lett.B641:278-285,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 1 figure. One numerical error in Eq.16 corrected

Scientific paper

10.1016/j.physletb.2006.08.064

In terms of the heavy chiral Lagrangian and the unitarized coupled-channel scattering amplitude, interaction between the heavy meson and the light pseudoscalar meson is studied. By looking for the pole of scattering matrix on an appropriate Riemann sheet, a $DK$ bound state $D_{s0}^*$ with the mass of $2.312\pm0.041$ GeV is found. This state can be associated as the narrow $D_{sJ}^*(2317)$ state found recently. In the same way, a $B{\bar K}$ bound state $B_{s0}^*$ is found, and its mass of $5.725\pm0.039$ GeV is predicted. The spectra of $D_0^*$ and $B_0^*$ with $I=1/2$ are further investigated. One broad and one narrow states are predicted in both charm and bottom sectors. The coupling constants and decay widths of the predicted states are also calculated.

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