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

Link:
Erscheinungsjahr:
2019
Medientyp:
Text
Schlagworte:
  • Double Drell–Yan
  • Double parton-scattering
  • Four-lepton production
  • Higgs golden decay channel
Beschreibung:
  • 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.

Lizenz:
  • info:eu-repo/semantics/openAccess
Quellsystem:
Forschungsinformationssystem der UHH

Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/87d55a60-02c5-4617-bed5-9303d7dfd67c