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Beyond nPDFs effects : Prompt J/psi and psi(2S) production in pPb and pp collisions

Oh, G; Sirunyan, AM; Tumasyan, A; Adam, W; Ambrogi, F; Asilar, E; Bergauer, T; ... Woods, N; + view all (2019) Beyond nPDFs effects : Prompt J/psi and psi(2S) production in pPb and pp collisions. Nuclear Physics A , 982 pp. 743-746. 10.1016/j.nuclphysa.2018.10.028. Green open access

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Abstract

A multi-dimensional analysis of prompt charmonia in pp and pPb collisions at √sNN = 5.02 TeV with the CMS detector is presented. The pPb differential cross-sections of prompt J/ψ are shown in a wide kinematic region, for transverse momentum pT spanning from 2 to 30 GeV/c and a rapidity interval between -2.4 to 1.93 in the center of mass of the collision. The final results on prompt ψ(2S) meson production cross section in pp and pPb collisions at 5.02 TeV are also reported as a function of pT and rapidity, for pT from 4 to 30 GeV/c. The nuclear modification factor is found to be smaller than that of prompt J/ψ in all measured bins, especially at low pT and at backward rapidity. Such a different behaviour between the ground and excited states cannot be reproduced considering nPDF effects alone.

Type: Article
Title: Beyond nPDFs effects : Prompt J/psi and psi(2S) production in pPb and pp collisions
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.nuclphysa.2018.10.028
Publisher version: https://doi.org/10.1016/j.nuclphysa.2018.10.028
Language: English
Additional information: © 2018 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creative commons.org/licenses/by-nc-nd/4.0/).
Keywords: Quarkonia, Charmonia, Prompt J/ψ, Prompt ψ(2S), Production
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10071058
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