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|Title:||Measurement of the prompt J/ψ pair production cross-section in pp collisions at √ s = 8 TeV with the ATLAS detector|
|Other Titles:||Measurement of the prompt J/psi pair production cross-section in pp collisions at root s = 8 TeV with the ATLAS detector|
|Citation:||European Physical Journal C, 2017; 77(2):1-34|
|M. Aaboud ...P. Jackson ... L. Lee ... A. Petridis ... M.J. White ... [et al.] (The ATLAS Collaboration)|
|Abstract:||The production of two prompt J/ψ mesons, each with transverse momenta pT>8.5 GeV and rapidity |y|<2.1, is studied using a sample of proton-proton collisions at s√ = 8 TeV, corresponding to an integrated luminosity of 11.4 fb⁻¹ collected in 2012 with the ATLAS detector at the LHC. The differential cross-section, assuming unpolarised J/ψ production, is measured as a function of the transverse momentum of the lower-pT J/ψ meson, di-J/ψ pT and mass, the difference in rapidity between the two J/ψ mesons, and the azimuthal angle between the two J/ψ mesons. The fraction of prompt pair events due to double parton scattering is determined by studying kinematic correlations between the two J/ψ mesons. The total and double parton scattering cross-sections are compared with predictions. The effective cross-section of double parton scattering is measured to be σeff=6.3±1.6(stat)±1.0(syst) mb.|
|Rights:||© CERN for the benefit of the ATLAS collaboration 2017. This article is published with open access at Springerlink.com|
|Appears in Collections:||Physics publications|
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