Strong and radiative decays of the Ds0*(2317) meson in the DK-molecule picture

We consider a possible interpretation of the new charm-strange meson D-s0(*)(2317) as a hadronic molecule-a bound state of D and K mesons. Using an effective Lagrangian approach, we calculate the strong D-s0(*)-> D-s pi(0) and radiative D-s0(*)-> D-s(*)gamma decays. A new impact related to the DK molecular structure of the D-s0(*)(2317) meson is that the presence of u(d) quarks in the D and K mesons gives rise to a direct strong isospin-violating transition D-s0(*)-> D-s pi(0) in addition to the decay mechanism induced by eta-pi(0) mixing considered previously. We show that the direct transition dominates over the eta-pi(0) mixing transition in the D-s0(*)-> D-s pi(0) decay. Our results for the partial decay widths are consistent with previous calculations.