Doubly heavy hadrons production in ultraperipheral collision

We study the double heavy baryon ΞQQ' and tetraquark TQQ production through photon-photon and photon-gluon fusion via ultraperipheral collisions at the LHC and FCC within the framework of nonrelativistic QCD factorization formalism. Various ion-ion collisions are taken into account, two cc(bb)-diquark configurations ([cc(bb),³S₁-3] and [cc(bb),¹S₀-6]) and four bc-diquark configurations ([bc,³S₁-3], [bc,³S₁-6], [bc,¹S₀-3] and [bc,¹S₀-6]) are considered in the calculation. Numerical results indicate that the [cc,³S₁-3] diquark provides dominant contribution for Ξcc (Tcc) production, and a considerable number of Ξcc (Tcc) can be produced. Due to the event topologies for ultraperipheral collision are very clear, the background from various QCD interactions can be suppressed, hence the experimental investigation for Ξcc and Tcc are feasible. The productions for Ξbc/bb are also discussed, leaving only slightly possibility for Ξbc through photon-gluon fusion with ultraperipheral collisions at the FCC.