TL;DR
This paper reports measurements of quarkonium production cross-sections in proton-proton collisions at 7 TeV using the ATLAS detector, providing data to test QCD predictions and distinguish prompt from non-prompt production.
Contribution
It presents the first detailed differential cross-section measurements of J/ and production at 7 TeV, including prompt and non-prompt components, and observes _{bJ} states.
Findings
Measured J/ and cross-sections as functions of transverse momentum and rapidity.
Determined the fraction of J/ from B-hadron decays.
Observed _{bJ} states in proton-proton collisions.
Abstract
The production of quarkonium is an important testing ground for QCD calculations. The J/\psi\ and \Upsilon\ production cross-sections are measured in proton-proton collisions at a centre-of-mass energy of 7~TeV with the ATLAS detector at the LHC. Differential cross-sections are presented as a function of transverse momentum and rapidity. The fraction of J/\psi\ produced in B-hadron decays is also measured and the differential cross-sections of prompt and non-prompt J/\psi\ production determined separately. Measurements of the fiducial production cross-section of the \Upsilon(1S) and observation of the \chi_{c,bJ} states are also discussed.
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