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; Paul Newman; ATLAS Collaboration

doi:10.1016/j.physletb.2019.01.062

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, Paul Newman, ATLAS Collaboration

Physics and Astronomy

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19 Citations (Scopus)

208 Downloads (Pure)

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.

Original language	English
Pages (from-to)	595-614
Number of pages	20
Journal	Physics Letters B
Volume	790
Early online date	4 Feb 2019
DOIs	https://doi.org/10.1016/j.physletb.2019.01.062
Publication status	Published - 10 Mar 2019

Bibliographical note

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

Keywords

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

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Aaboud_et_al_Study_of_the_hard_double-parton_Physics_Letters_B_2019Final published version, 1.53 MBLicence: Creative Commons: Attribution (CC BY)

https://www.sciencedirect.com/science/article/pii/S0370269319300875Licence: Creative Commons: Attribution (CC BY)

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

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. ",

keywords = "Double Drell–Yan, Double parton-scattering, Four-lepton production, Higgs golden decay channel",

author = "M. Aaboud and Paul Newman and {ATLAS Collaboration}",

note = "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",

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doi = "10.1016/j.physletb.2019.01.062",

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AU - Aaboud, M.

AU - Newman, Paul

AU - ATLAS Collaboration

N1 - 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

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N2 - 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.

AB - 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.

KW - Double Drell–Yan

KW - Double parton-scattering

KW - Four-lepton production

KW - Higgs golden decay channel

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DO - 10.1016/j.physletb.2019.01.062

M3 - Article

SN - 0370-2693

VL - 790

SP - 595

EP - 614

JO - Physics Letters B

JF - Physics Letters B

ER -

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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