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

Philip James Clark; Sinead Farrington; Michele Faucci Giannelli; Yanyan Gao; Ahmed Hasib; Christos Leonidopoulos; Victoria Jane Martin; Liza Mijovic; Benjamin Wynne; 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 $\sqrt s=$ 8 TeV with the ATLAS detector

Philip James Clark, Sinead Farrington, Michele Faucci Giannelli, Yanyan Gao, Ahmed Hasib, Christos Leonidopoulos, Victoria Jane Martin, Liza Mijovic, Benjamin Wynne, Atlas Collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	Aaboud:2018tiq
Pages (from-to)	595
Journal	Physics Letters B
Volume	790
DOIs	https://doi.org/10.1016/j.physletb.2019.01.062
Publication status	Published - 10 Mar 2019

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Clark, P. J., Farrington, S., Faucci Giannelli, M., Gao, Y., Hasib, A., Leonidopoulos, C., Martin, V. J., Mijovic, L., Wynne, B., & Collaboration, A. (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. Physics Letters B, 790, 595. Article Aaboud:2018tiq. https://doi.org/10.1016/j.physletb.2019.01.062

@article{3ba98adc1de343b58eed1160a058861c,

title = "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",

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.",

author = "Clark, {Philip James} and Sinead Farrington and {Faucci Giannelli}, Michele and Yanyan Gao and Ahmed Hasib and Christos Leonidopoulos and Martin, {Victoria Jane} and Liza Mijovic and Benjamin Wynne and Atlas Collaboration",

year = "2019",

month = mar,

day = "10",

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

language = "English",

volume = "790",

pages = "595",

journal = "Physics Letters B",

issn = "1873-2445",

publisher = "Elsevier",

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Clark, PJ , Farrington, S, Faucci Giannelli, M, Gao, Y, Hasib, A, Leonidopoulos, C , Martin, VJ , Mijovic, L , Wynne, B & Collaboration, A 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', Physics Letters B, vol. 790, Aaboud:2018tiq, pp. 595. https://doi.org/10.1016/j.physletb.2019.01.062

TY - JOUR

T1 - 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

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Faucci Giannelli, Michele

AU - Gao, Yanyan

AU - Hasib, Ahmed

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Collaboration, Atlas

PY - 2019/3/10

Y1 - 2019/3/10

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 $\sqrt{s}$ = 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.

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 $\sqrt{s}$ = 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.

U2 - 10.1016/j.physletb.2019.01.062

DO - 10.1016/j.physletb.2019.01.062

M3 - Article

SN - 1873-2445

VL - 790

SP - 595

JO - Physics Letters B

JF - Physics Letters B

M1 - Aaboud:2018tiq

ER -

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

Abstract

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