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 \( {M}_{cc}^{+}\equiv {D}^0{D}^{\ast +} \). 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 D0D∗+ threshold 3875.1 MeV, which makes decay of the molecule \( {M}_{cc}^{+} \) to a pair of conventional mesons D0D∗+ kinematically allowed process. The strong coupling G of particles at the vertex \( {M}_{cc}^{+}{D}^0{D}^{\ast +} \) is found by applying the QCD three-point sum rule approach, and used to evaluate the width of the decay \( {M}_{cc}^{+}\to {D}^0{D}^{\ast +} \). Obtained result for the width Γ = (3.8 ± 1.7) MeV demonstrates that \( {M}_{cc}^{+} \) is wider than the resonance \( {T}_{cc}^{+} \).
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Agaev, S.S., Azizi, K. & Sundu, H. Hadronic molecule model for the doubly charmed state \( {T}_{cc}^{+} \). J. High Energ. Phys. 2022, 57 (2022). https://doi.org/10.1007/JHEP06(2022)057
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DOI: https://doi.org/10.1007/JHEP06(2022)057