Hadronic molecule model for the doubly charmed state Tcc

A bstract The mass, current coupling, and width of the doubly charmed four-quark meson T cc + are explored by treating it as a hadronic molecule M cc + ≡ D 0 D ∗ + . The mass and current coupling of this molecule are calculated using the QCD two-point sum rule method by including into analysis contributions of various vacuum condensates up to dimension 10. The prediction for the mass m = (4060 ± 130) MeV exceeds the two-meson D 0 D ∗+ threshold 3875 . 1 MeV, which makes decay of the molecule M cc + to a pair of conventional mesons D 0 D ∗+ kinematically allowed process. The strong coupling G of particles at the vertex M cc + D 0 D ∗ + is found by applying the QCD three-point sum rule approach, and used to evaluate the width of the decay M cc + → D 0 D ∗ + . Obtained result for the width Γ = (3 . 8 ± 1 . 7) MeV demonstrates that M cc + is wider than the resonance T cc + .