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Volume 297 - XXV International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2017) - WG5 Physics with Heavy Flavours
Associated production of $J/\psi$ pairs with the ATLAS detector
M. Watson* on behalf of the ATLAS collaboration
*corresponding author
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Pre-published on: 2017 September 12
Published on: 2018 January 16
A recent measurement of prompt J/psi pair production is presented, using a sample of 11.4 fb-1 of proton-proton collision data collected at 8 TeV in the ATLAS detector. The differential cross-section is measured as a function of kinematic distributions for the lower-pT J/psi meson and for the di-J/psi system. A data-driven approach is used to extract the fraction of prompt J/psi pair events due to double parton scattering and an effective cross-section of double parton scattering is measured to be sigma_eff=6.3+-1.6(stat)+-1.0(syst)+-0.1(BF)+-0.1(lumi) mb.
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