Indirect production of doubly charmed tetraquark T cc at high energy colliders

The indirect production mechanisms of doubly charmed tetraquark Tcc through three decay channels, within the framework of nonrelativistic QCD. The intermediate (cc)3<overline> diquark cluster in color antitriplet evolves into tetraquark components via the fragmentation process by trapping two light antiquarks (q<overline> and q') from the vacuum. After the considered doubly charmed tetraquark components are summed, including <overline> cc , the decay widths, branching ratios, and produced events each year for the production of Tcc can be predicted at LHC and Circular Electron-Positron Collider (CEPC), respectively. The differential distributions and two main sources of theoretical uncertainty are also discussed. The results show that the produced events each year for Tcc via W+ decays is 1.80 x 105, nearly 2 orders of magnitude larger than that by Higgs decays (1.11 x 103) and Z0 decays (4.81 x 103) at LHC. However at CEPC, the largest contribution for the production of Tcc is through Z0 decays, about 1.63 x 106. There are only 4.79 x 10-1 and 2.03 x 102 Tcc events produced each year at CEPC through Higgs and W+ decay, respectively.