Hadronic molecule model for the doubly charmed state Tcc+

Abstract

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(+ )(math) (DD)-D-0*(+). 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 in = (4060 +/- 130) MeV exceeds the two-meson (DD)-D-0*(+) threshold 3875.1 MeV, which makes decay of the molecule M-cc(+) to a pair of conventional mesons (DD)-D-0*(+) kinematically allowed process. The strong coupling G of particles at the vertex (Mcc+DD)-D-0*(+) is found by applying the QCD three-point sum rule approach, and used to evaluate the width of the decay M-cc(+)-> (DD)-D-0*(+). Obtained result for the width Gamma = (3.8 +/- 1.7) MeV demonstrates that M-cc(+) is wider than the resonance T-cc(+).