Forward J/ψ production at high energy: Centrality dependence and mean transverse momentum
Ducloue, B., Lappi, T., & Mäntysaari, H. (2016). Forward J/ψ production at high energy: Centrality dependence and mean transverse momentum. Physical Review D, 94(7), Article 074031. https://doi.org/10.1103/PhysRevD.94.074031
Published inPhysical Review D
© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
Forward rapidity J=ψ meson production in proton-nucleus collisions can be an important constraint of descriptions of the small-x nuclear wave function. In an earlier work we studied this process using a dipole cross section satisfying the Balitsky-Kovchegov equation, fit to HERA inclusive data and consistently extrapolated to the nuclear case using a standard Woods-Saxon distribution. In this paper we present further calculations of these cross sections, studying the mean transverse momentum of the meson and the dependence on collision centrality. We also extend the calculation to backward rapidities using nuclear parton distribution functions. We show that the parametrization is overall rather consistent with the available experimental data. However, there is a tendency towards a too strong centrality dependence. This can be traced back to the rather small transverse area occupied by small-x gluons in the nucleon that is seen in the HERA data, compared to the total inelastic nucleon-nucleon cross section. ...
PublisherAmerican Physical Society
Publication in research information system
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Related funder(s)Academy of Finland
Funding program(s)Research post as Academy Research Fellow, AoF
Additional information about fundingT. L. and B. D. are supported by the Academy of Finland, Grants No. 267321 and No. 273464. H. M. is supported under DOE Award No. DE-SC0012704. This research used computing resources of CSC—IT Center for Science in Espoo, Finland. We thank C. Hadjidakis and I. Lakomov for discussions on the ALICE data.
Showing items with similar title or keywords.
Ducloue, Bertrand; Lappi, Tuomas; Mäntysaari, H. (EDP Sciences, 2016)Forward J/ψ production and suppression in high energy proton-nucleus collisions can be an important probe of gluon saturation. In an earlier work we studied this process in the Color Glass Condensate framework and showed ...
Ducloue, Bertrand; Lappi, Tuomas; Mäntysaari, Heikki (American Physical Society, 2015)Inclusive production of J/ψ mesons, especially at forward rapidities, is an important probe of small-x gluons in protons and nuclei. In this paper we reevaluate the production cross sections in the color glass condensate ...
Ducloué, B.; Lappi, Tuomas; Mäntysaari, Heikki (Elsevier BV, 2019)We calculate isolated photon production at forward rapidities in proton-nucleus collisions in the Color Glass Condensate framework. Our calculation uses dipole cross sections solved from the running coupling Balitsky-Kovchegov ...
Ducloue, Bertrand; Lappi, Tuomas; Mäntysaari, H. (Sissa, 2016)The nuclear suppression of forward J/ψ production in high energy proton-nucleus collisions can be used as a probe of gluon saturation at small x. In an earlier work we studied this suppression in minimum bias collisions ...
Centrality and transverse momentum dependence of inclusive J/ψ production at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV ALICE collaboration (Elsevier, 2020)The inclusive J/ψ meson production in Pb–Pb collisions at a center-of-mass energy per nucleon–nucleon collision of √sNN=5.02TeV at midrapidity (|y| <0.9) is reported by the ALICE Collaboration. The measurements are performed ...