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

Oh, Geonhee and Anderson, D. and Bornheim, A. and Lawhorn, J. M. and Newman, H. B. and Nguyen, T. Q. and Spiropulu, M. and Vlimant, J. R. and Wilkinson, R. and Xie, S. and Zhang, Z. and Zhu, R. Y. (2019) Beyond nPDFs effects: Prompt J/ψ and ψ(2S) production in pPb and pp collisions. Nuclear Physics A, 982 . pp. 743-746. ISSN 0375-9474.

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A multi-dimensional analysis of prompt charmonia in pp and pPb collisions at √s_(NN) = 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 p_T 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 p_T and rapidity, for p_T 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 p_T and at backward rapidity. Such a different behaviour between the ground and excited states cannot be reproduced considering nPDF effects alone.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bornheim, A.0000-0002-0128-0871
Lawhorn, J. M.0000-0002-8597-9259
Newman, H. B.0000-0003-0964-1480
Nguyen, T. Q.0000-0003-3954-5131
Spiropulu, M.0000-0001-8172-7081
Xie, S.0000-0003-2509-5731
Zhang, Z.0000-0002-1630-0986
Zhu, R. Y.0000-0003-3091-7461
Additional Information:© 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license ( Available online 22 January 2019.
Subject Keywords:Quarkonia; Charmonia; Prompt J/ψ; Prompt ψ(2S); Production
Record Number:CaltechAUTHORS:20190228-104502977
Persistent URL:
Official Citation:Geonhee Oh, Beyond nPDFs effects: Prompt J/ψ and ψ(2S) production in pPb and pp collisions, Nuclear Physics A, Volume 982, 2019, Pages 743-746, ISSN 0375-9474, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93337
Deposited By: Tony Diaz
Deposited On:28 Feb 2019 19:11
Last Modified:09 Mar 2020 13:18

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