Measurement of the prompt J/ψ pair production cross-section in pp collisions at √s=8 TeV with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Aben, R, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2833 more authors) (2017) Measurement of the prompt J/ψ pair production cross-section in pp collisions at √s=8 TeV with the ATLAS detector EUROPEAN PHYSICAL JOURNAL C, 77 (2). 76-. ISSN 1434-6044, 1434-6052

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Abstract

The production of two prompt J/ ψ mesons, each with transverse momenta p<inf>T</inf>> 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<sup>- 1</sup> 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-p<inf>T</inf>J/ ψ meson, di-J/ ψp<inf>T</inf> 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 σ<inf>eff</inf>= 6.3 ± 1.6 (stat) ± 1.0 (syst) mb.

Item Type: Article
Additional Information: 53 pages in total, author list starting page 37, 15 figures, 4 tables, published version, all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2015-02/
Uncontrolled Keywords: ATLAS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 14 Mar 2017 14:49
Last Modified: 24 Jun 2026 20:44
DOI: 10.1140/epjc/s10052-017-4644-9
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006383
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