High-pT ψψ production as signals for Double Parton scattering at hadron colliders
Feng Yuan, Kuang-Ta Chao
Abstract
We present an analysis of the ψψproduction from double parton (DP) sacttering and single parton (SP) scattering in the large pT region via color-octet gluon fragmentation. We find that at the Tevatron the DP ψψproduction is at the edge of the detectability at present, and at the LHC the DP cross section will dominate over the SP cross section in the lower pT(min) region (i.e., pT(min)<7GeV). We also conclude that the color-octet mechanism is of crucial importance to the double j/psi production at high energy hadron colliders.
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