Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-04-15
Nucl. Phys. B 850 (2011) 387-444
Physics
High Energy Physics
High Energy Physics - Experiment
35 pages plus author list (53 pages total), 11 figures, 14 tables, submitted to Nuclear Physics B
Scientific paper
10.1016/j.nuclphysb.2011.05.015
The inclusive J/psi production cross-section and fraction of J/psi mesons produced in B-hadron decays are measured in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector at the LHC, as a function of the transverse momentum and rapidity of the J/psi, using 2.3 pb-1 of integrated luminosity. The cross-section is measured from a minimum pT of 1 GeV to a maximum of 70 GeV and for rapidities within |y| < 2.4 giving the widest reach of any measurement of J/psi production to date. The differential production cross-sections of prompt and non-prompt J/psi are separately determined and are compared to Colour Singlet NNLO*, Colour Evaporation Model, and FONLL predictions.
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