Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton-nucleus collisions

Abstract : We propose a simple and model-independent procedure to account for the impact of the nuclear modification of the gluon density as encoded in nuclear collinear PDF sets on two-to-two partonic hard processes in proton-nucleus collisions. This applies to a good approximation to quarkonium, D and B meson production, generically referred to H. Our procedure consists in parametrising the square of the parton scattering amplitude, A_{gg -> H X} and constraining it from the proton-proton data. Doing so, we have been able to compute the corresponding nuclear modification factors for J/psi, Upsilon and D^0 as a function of y and P_T at sqrt(s_NN)=5 and 8 TeV in the kinematics of the various LHC experiments in a model independent way. It is of course justified since the most important ingredient in such evaluations is the probability of each kinematical configuration. Our computations for D mesons can also be extended to B meson production. To further illustrate the potentiality of the tool, we provide --for the first time-- predictions for the nuclear modification factor for eta_c production in pPb collisions at the LHC.
Type de document :
Pré-publication, Document de travail
18 pages, 56 figures, 4 tables. Latex. 2016
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http://hal.in2p3.fr/in2p3-01384325
Contributeur : Sophie Heurteau <>
Soumis le : mercredi 19 octobre 2016 - 16:42:47
Dernière modification le : jeudi 11 janvier 2018 - 06:12:41

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  • HAL Id : in2p3-01384325, version 1
  • ARXIV : 1610.05382

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J.P. Lansberg, H. S. Shao. Towards an automated tool to evaluate the impact of the nuclear modification of the gluon density on quarkonium, D and B meson production in proton-nucleus collisions. 18 pages, 56 figures, 4 tables. Latex. 2016. 〈in2p3-01384325〉

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