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

M Aaboud, Torsten Åkesson, Simona Bocchetta, Lene Bryngemark, Eric Corrigan, Caterina Doglioni, Kristian Gregersen, Eva Brottmann Hansen, Vincent Hedberg, Göran Jarlskog, Charles Kalderon, Edgar Kellermann, Balazs Konya, Else Lytken, Katja Mankinen, Caterina Marcon, Ulf Mjörnmark, Geoffrey Mullier, Ruth Pöttgen, Trine PoulsenOxana Smirnova, L Zwalinski, ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

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<m 4ℓ <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 f DPS =0.042, which results in an estimated lower limit on the effective cross section at 95% confidence level of 1.0 mb. © 2019 The Author(s)
Original languageEnglish
Pages (from-to)595-614
Number of pages20
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume790
DOIs
Publication statusPublished - 2019

Bibliographical note

Export Date: 21 February 2019

Subject classification (UKÄ)

  • Subatomic Physics

Free keywords

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

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