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

Abraham, N L, Allbrooke, B, Asquith, L, Cerri, A, Safarzadeh Samani, B, DeSanto, A, Salvatore, F, Shaw, K, Stevenson, T, Suruliz, K, Sutton, M, Vivarelli, I, The ATLAS Collaboration, and others, (2019) Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at √s=8 TeV with the ATLAS detector. Physics Letters B, 790. pp. 595-614. ISSN 0370-2693

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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 20.2fb−1of data recorded in the ATLAS detector at the LHC at centre-of-mass energy √s=8TeV. In the four-lepton invariant-mass range of 80 <m4<1000GeV, 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 1.0mb.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Amelia Redman
Date Deposited: 28 Aug 2019 16:23
Last Modified: 29 Aug 2019 11:15
URI: http://sro.sussex.ac.uk/id/eprint/85621

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