New heavy mesons as hadronic molecules

We discuss a possible interpretation of the Ds0∗(2317), Ds1(2460)Ds1(2460), Bs0∗(5725) and Bs1(5778)Bs1(5778) mesons as hadronic molecules. Using an effective Lagrangian approach we calculate their weak, strong and radiative decays. The new impact of the molecular structure of these states is the presence of u(d)u(d) quarks in the KK, D(∗)D(∗) and B(∗)B(∗) mesons which gives rise to the direct strong isospin-violating transitions Ds0∗(Bs0∗)→Ds(Bs)+π0 and Ds1(Bs1)→Ds∗(Bs∗)+π0 in addition to the modes generated by η−π0η−π0 mixing as was considered before in the literature.