The nature of exotic hadrons beyond the conventional quark model has being a hot topic in hadron physics. Since the observation of the first exotic charmonium-like state, i.e. the X(3872), numerous exotic candidates have been reported by various experimental collaboration. Especially, the fully charm tetra quark X(6900) and the double charm tetraquark Tcc observed in pp collision arouse...
We discuss the interaction between an anti-$D$ meson and a nucleon in terms of the meson exchange model. We provide the interaction vertices and the non-relativistic potentials, based on the chiral symmetry and the heavy quark spin symmetry. In numerical calculations, we show several bound states below the lowest thresholds, which contain at least five quarks as the pentaquark states. We...
We investigate the centrality and momentum dependence of X(3872) in heavy-ion collisions via the Langevin equation and instant coalescence model (LICM). When X(3872) is treated as a compact tetraquark state, the tetraquarks are produced via the coalescence of heavy and light quarks near the quantum chromodynamic (QCD) phase transition due to the restoration of the heavy quark potential at...
