Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/115053
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Type: Journal article
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
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
AbouZeid, O.
Abraham, N.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adachi, S.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
et al.
Citation: European Physical Journal C, 2017; 77(2):1-34
Publisher: Springer
Issue Date: 2017
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
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.
Keywords: ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2017. This article is published with open access at Springerlink.com
RMID: 0030067960
DOI: 10.1140/epjc/s10052-017-4644-9
Appears in Collections:Physics publications

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