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Scientific article
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English

Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at √s = 8 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysics Letters. B, vol. 790, p. 595-614
Collection
  • Open Access - SCOAP3
Publication date2019
Abstract

The inclusive production of four isolated charged leptons in pp collisions is analysed for the presence of hard double-parton scattering, using 20.2 fb−1 of data recorded in the ATLAS detector at the LHC at centre-of-mass energy s=8 TeV. In the four-lepton invariant-mass range of 80<1000 GeV, an artificial neural network is used to enhance the separation between single- and double-parton scattering based on the kinematics of the four leptons in the final state. An upper limit on the fraction of events originating from double-parton scattering is determined at 95% confidence level to be fDPS=0.042 , which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb.

Keywords
  • Four-lepton production
  • Double Drell–Yan
  • Double parton-scattering
  • Higgs golden decay channel
Citation (ISO format)
ATLAS Collaboration. Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at √s = 8 TeV with the ATLAS detector. In: Physics Letters. B, 2019, vol. 790, p. 595–614. doi: 10.1016/j.physletb.2019.01.062
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Article (Published version)
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ISSN of the journal0370-2693
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