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



Collaboration, ATLAS
(2019) Study of the hard double-parton scattering contribution to inclusive four-lepton production in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector. Phys. Lett., 790. 595 - 595.

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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 $\sqrt{s}$ = 8 TeV. In the four-lepton invariant-mass range of $80<m_{4\ell}<1000$ 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 $f_{\mathrm{DPS}} = 0.042$, which results in an estimated lower limit on the effective cross section at 95% confidence level of $1.0$ mb.

Item Type: Article
Additional Information: 35 pages in total, author list starting page 19, 4 figures, submitted to Phys. Lett. B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-15
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 22 Feb 2019 11:13
Last Modified: 16 May 2021 10:11
DOI: 10.1016/j.physletb.2019.01.062
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3033265