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

The ATLAS Collaboration

Research output: Contribution to journalArticle

13 Scopus citations

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<m4ℓ<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.

Original languageEnglish (US)
Pages (from-to)595-614
Number of pages20
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume790
DOIs
StatePublished - Jan 1 2019

Keywords

  • Double Drell–Yan
  • Double parton-scattering
  • Four-lepton production
  • Higgs golden decay channel

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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