Measurement of differential J/psi production cross sections and forward-backward ratios in p plus Pb collisions with the ATLAS detector
Number of Authors: 2810
2015 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 92, no 3, 034904Article in journal (Refereed) Published
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
IdentifiersURN: urn:nbn:se:su:diva-122333DOI: 10.1103/PhysRevC.92.034904ISI: 000361118900010OAI: oai:DiVA.org:su-122333DiVA: diva2:874108