In this study, we investigate the discovery potential of double-charm tetraquarks $T^{ \{ cc\}}_{ [\bar{ q}\bar{ q}']}$. We find that their production cross sections at the LHCb with $\sqrt{ s} = 13$ TeV reach $\mathcal{ O}(10^4)$ pb, which indicates that the LHCb has collected $\mathcal{ O}(10^8)$ such particles. Through the decay channels of $T^{ \{ cc\}}_{ [\bar{ u}\bar{ d}]}\to D^{ +}K^{ -}\pi^{ +}$ or $D^0D^+\gamma$ (if stable) or $T^{ \{ cc\}}_{ [\bar{ u}\bar{ d}]}\to D^0D^{ *+}\to D^0D^0\pi^+$ (if unstable), it is highly expected that they get discovered at the LHCb in the near future. We also discuss the productions and decays of the double-charm tetraquarks at future Tera-$Z$ factories.
Categories: hep-ph hep-ex