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Study of the hard double-parton scattering contribution to inclusive four-lepton production in pp collisions at root s=8 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-5935-7464
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Number of Authors: 29242019 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 290, p. 595-614Article in journal (Refereed) Published
Abstract [en]

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 root 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. 

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 290, p. 595-614
Keywords [en]
Four-lepton production; Double Drell-Yan; Double parton-scattering; Higgs golden decay channel
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-247988DOI: 10.1016/j.physletb.2019.01.062ISI: 000460118200077OAI: oai:DiVA.org:kth-247988DiVA, id: diva2:1301039
Note

QC 20190401

Available from: 2019-04-01 Created: 2019-04-01 Last updated: 2019-04-01Bibliographically approved

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Lund-Jensen, BengtOhm, ChristianRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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