부산대학교 도서관

In this paper, we give a brief review of recent theoretical studies of double prompt J / ψ production at the FNAL Tevatron and the CERN LHC, to which both single- and double-parton-scattering processes contribute. In single parton scattering, we mainly present the results computed within the framework of non-relativistic quantum chromodynamics factorization combined with one of the two approaches to describe the parton inside the (anti)proton, the collinear parton model and the parton Reggeization approach. The contributions from double parton scattering calculated with different values of σ eff are also discussed. We conclude that, in double prompt J / ψ hadroproduction, there remain some differences between theoretical predictions and experimental measurements. [ABSTRACT FROM AUTHOR]