Measurement of the differential cross-sections of prompt and non-prompt production of J/ψ and ψ (2S) in pp collisions at √s = 7 and 8 TeV with the ATLAS detector

Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Measurement of the differential cross-sections of prompt and non-prompt production of J/ψ and ψ (2S) in pp collisions at √s = 7 and 8 TeV with the ATLAS detector. European physical journal. C - particles and fields, 76(5) EDP Sciences 10.1140/epjc/s10052-016-4050-8

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The production rates of prompt and non-prompt J/ψ and ψ(2S) mesons are measured using 2.1 fb⁻¹ and 11.4 fb⁻¹ of data collected with the ATLAS experiment at the LHC, in proton-proton collisions at √s=7 and 8 TeV respectively. Production cross-sections for both prompt and non-prompt production sources, ratios of ψ(2S) to J/ψ production, and fractions of non-prompt to inclusive production for J/ψ and ψ(2S) are measured double-differentially as a function of meson pT and rapidity. These measurements are made in a restricted fiducial volume and also corrected for geometrical acceptance after which they are compared to a variety of theoretical predictions.

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