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Measurement of the prompt J/ψ pair production cross-section in pp collisions at √s = 8 TeV with the ATLAS detector
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ATLAS Collaboration (Including: Beckingham, M., Ennis, Joseph Stanford, Farrington, Sinead, Harrison, P. F., Jeske, C., Jones, G., Martin, T. A., Murray, W., Pianori, E. and Spangenberg, Martin). (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. doi:10.1140/epjc/s10052-017-4644-9 ISSN 1434-6044.
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Official URL: http://doi.org/10.1140/epjc/s10052-017-4644-9
Abstract
t 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.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Journal or Publication Title: | European Physical Journal C | ||||||
| Publisher: | Springer | ||||||
| ISSN: | 1434-6044 | ||||||
| Official Date: | 7 February 2017 | ||||||
| Dates: |
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| Volume: | 77 | ||||||
| Number: | 2 | ||||||
| Article Number: | 76 | ||||||
| DOI: | 10.1140/epjc/s10052-017-4644-9 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) |
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