Research Information System
European Physical Journal Plus, vol.138, no.7, 2023 (SCI-Expanded, Scopus)
The spectroscopic parameters and widths of the axial-vector Tcc:sAV and scalar Tcc:sS , T~cc:sS strange partners of the doubly charmed exotic meson Tcc+ with the content ccu¯ s¯ , are calculated in the framework of the QCD sum rule method. We model Tcc:sAV as the diquark–antidiquark state composed of axial-vector and scalar components, whereas scalar particles Tcc:sS and T~cc:sS are built of axial-vector and scalar diquarks, respectively. The masses and current couplings of these tetraquarks are calculated in the context of the two-point sum rule approach by taking into account the quark, gluon and mixed condensates up to dimension 10. The full width of the state Tcc:sAV is found from analysis of the processes Tcc:sAV→D0Ds∗+ and Tcc:sAV→D∗(2007)0Ds+ . Decays to D0Ds+ , D∗(2007)0Ds∗+ and D0Ds+ mesons are utilized in the case of the scalar tetraquarks Tcc:sS and T~cc:sS , respectively. The partial widths of the aforementioned decays are determined via the strong couplings g1 , g2 , G1 , G2 and G~ , which describe the strong interactions of the particles at the relevant tetraquark–meson–meson vertices. These couplings are computed using the QCD three-point sum rule method, most appropriate for the strong decays under study. The predictions m=(3995±143)MeV and ΓAV=(72±13)MeV , as well as mS=(4128±142)MeV , ΓS=(213±47)MeV and m~S=(4035±145)MeV and Γ~S=(123±32)MeV obtained for the masses and widths of these tetraquarks in the present work can be useful in future experimental investigations of the doubly charmed four-quark resonances.