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High Energy Physics - Phenomenology

arXiv:1304.2221 (hep-ph)
[Submitted on 8 Apr 2013 (v1), last revised 26 Apr 2013 (this version, v2)]

Title:Heavy quark pair production in high energy pA collisions: Quarkonium

Authors:Hirotsugu Fujii, Kazuhiro Watanabe
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Abstract:Quarkonium production in high-energy proton (deuteron)-nucleus collisions is investigated in the color glass condensate framework. We employ the color evaporation model assuming that the quark pair produced from dense small-x gluons in the nuclear target bounds into a quarkonium outside the target. The unintegrated gluon distribution at small Bjorken x in the nuclear target is treated with the Balitsky-Kovchegov equation with running coupling corrections. For the gluons in the proton, we examine two possible descriptions, unintegrated gluon distribution and ordinary collinear gluon distribution. We present the transverse momentum spectrum and nuclear modification factor for J/psi production at RHIC and LHC energies, and those for Upsilon(1S) at LHC energy, and discuss the nuclear modification factor and the momentum broadening by changing the rapidity and the initial saturation scale.
Comments: 27 pages, 17 figures; typos corrected, references added
Subjects: High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: UT-Komaba-13-5
Cite as: arXiv:1304.2221 [hep-ph]
  (or arXiv:1304.2221v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1304.2221
Related DOI: https://doi.org/10.1016/j.nuclphysa.2013.06.011

Submission history

From: Hirotsugu Fujii [view email]
[v1] Mon, 8 Apr 2013 14:34:58 UTC (198 KB)
[v2] Fri, 26 Apr 2013 10:06:46 UTC (199 KB)
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