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# Next-to-Leading Order Differential Cross Sections for J/ψ,ψ(2S), and Υ Production in Proton-Proton Collisions at a Fixed-Target Experiment Using the LHC Beams (AFTER@LHC)

## Abstracts

 Using nonrelativistic QCD (NRQCD) factorization, we calculate the yields for?J/ψ,?ψ(2S)?and?Υ(1S)hadroproduction at?s√=?72 GeV and 115 GeV including the next-to-leading order QCD corrections. Both these center-of-mass energies correspond to those obtained with 7~TeV and 2.76~TeV nucleon beam impinging a fixed target. We study the cross section integrated in?pt?as a function of the rapidity as well as the?pt?differential cross section in the central rapidity region. Using different NLO fit results of the NRQCD long-distance matrix elements, we evaluate a theoretical uncertainty which is certainly much larger than the projected experimental uncertainties with the expected 20 fb?1?to be collected per year with AFTER@LHC.
Recommended references： Yu Feng,Jian-Xiong Wang.(2016).Next-to-Leading Order Differential Cross Sections for J/ψ,ψ(2S), and Υ Production in Proton-Proton Collisions at a Fixed-Target Experiment Using the LHC Beams (AFTER@LHC).[ChinaXiv:201609.01016] (Click&Copy)
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