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Measurement of differential J/psi production cross sections and forward-backward ratios in p plus Pb collisions with the ATLAS detector
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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2015 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 92, no 3, 034904Article in journal (Refereed) Published
Abstract [en]

Measurements of differential cross sections for J/psi production in p + Pb collisions at root S-NN= 5.02 TeV at the CERN Large Hadron Collider with the ATLAS detector are presented. The data set used corresponds to an integrated luminosity of 28.1 nb(-1). The J/psi mesons are reconstructed in the dimuon decay channel over the transverse momentum range 8 < PT < 30 GeV and over the center-of-mass rapidity range -2.87 < y* < 1.94. Prompt J/psi are separated from J/psi resulting from b-hadron decays through an analysis of the distance between the J/psi decay vertex and the event primary vertex. The differential cross section for production of nonprompt J/psi is compared to a FONLL calculation that does not include nuclear effects. Forward-backward production ratios are presented and compared to theoretical predictions. These results complement previously published results by covering a region of higher transverse momentum and more central rapidity. They thus constrain the kinematic dependence of nuclear modifications of charmonium and b-quark production in p + Pb collisions.

Place, publisher, year, edition, pages
2015. Vol. 92, no 3, 034904
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-265581DOI: 10.1103/PhysRevC.92.034904ISI: 000361118900010OAI: oai:DiVA.org:uu-265581DiVA: diva2:866321
Funder
Swedish Research Council
Note

ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1103/PhysRevC.92.034904

Available from: 2015-11-02 Created: 2015-11-02 Last updated: 2017-12-01Bibliographically approved

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Bergeås, Elin KuutmannBrenner, RichardBuszello, Claus P.Ekelöf, TordEllert, MattiasFerrari, ArnaudIsaksson, CharlieMadsen, AlexanderÖhman, HenrikPelikan, DanielRangel-Smith, Camilla
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