Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016

Agni Bethani; Brian Cox; Jonathan Crane; Cinzia Da Via; Nicholas Dann; Alessandra Forti; David Lack; Frederick Loebinger; Jiri Masik; Stephen Menary; Francisca Munoz Sanchez; Alexander Oh; Emily Orgill; Joleen Pater; Yvonne Peters; Andrew Pilkington; Darren Price; Yang Qin; Jacob Rawling; Nicolas Scharmberg; Savanna Shaw; Stephen Watts; Terence Wyatt; The ATLAS Collaboration

doi:10.1140/epjc/s10052-019-6650-6

Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016

Agni Bethani, Brian Cox, Jonathan Crane, Cinzia Da Via, Nicholas Dann, Alessandra Forti, David Lack, Frederick Loebinger, Jiri Masik, Stephen Menary, Francisca Munoz Sanchez, Alexander Oh, Emily Orgill, Joleen Pater, Yvonne Peters, Andrew Pilkington, Darren Price, Yang Qin, Jacob Rawling, Nicolas ScharmbergSavanna Shaw, Stephen Watts, Terence Wyatt, The ATLAS Collaboration

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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 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
Journal	European Physical Journal C
Volume	79
Issue number	205
Early online date	7 Mar 2019
DOIs	https://doi.org/10.1140/epjc/s10052-019-6650-6
Publication status	Published - Mar 2019

Keywords

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

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Bethani, A., Cox, B., Crane, J., Da Via, C., Dann, N., Forti, A., Lack, D., Loebinger, F., Masik, J., Menary, S., Munoz Sanchez, F., Oh, A., Orgill, E., Pater, J., Peters, Y., Pilkington, A., Price, D., Qin, Y., Rawling, J., ... The ATLAS Collaboration (2019). Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016. European Physical Journal C, 79(205). https://doi.org/10.1140/epjc/s10052-019-6650-6

@article{f88895c6e3744bb3a26a622601ab75dd,

title = "Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016",

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 804ℓ <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 = "Agni Bethani and Brian Cox and Jonathan Crane and {Da Via}, Cinzia and Nicholas Dann and Alessandra Forti and David Lack and Frederick Loebinger and Jiri Masik and Stephen Menary and {Munoz Sanchez}, Francisca and Alexander Oh and Emily Orgill and Joleen Pater and Yvonne Peters and Andrew Pilkington and Darren Price and Yang Qin and Jacob Rawling and Nicolas Scharmberg and Savanna Shaw and Stephen Watts and Terence Wyatt and {The ATLAS Collaboration}",

year = "2019",

month = mar,

doi = "10.1140/epjc/s10052-019-6650-6",

language = "English",

volume = "79",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "205",

}

Bethani, A, Cox, B, Crane, J, Da Via, C, Dann, N, Forti, A, Lack, D, Loebinger, F, Masik, J, Menary, S, Munoz Sanchez, F , Oh, A, Orgill, E, Pater, J, Peters, Y , Pilkington, A , Price, D, Qin, Y, Rawling, J, Scharmberg, N, Shaw, S, Watts, S, Wyatt, T & The ATLAS Collaboration 2019, 'Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016', European Physical Journal C, vol. 79, no. 205. https://doi.org/10.1140/epjc/s10052-019-6650-6

TY - JOUR

T1 - Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016

AU - Bethani, Agni

AU - Cox, Brian

AU - Crane, Jonathan

AU - Da Via, Cinzia

AU - Dann, Nicholas

AU - Forti, Alessandra

AU - Lack, David

AU - Loebinger, Frederick

AU - Masik, Jiri

AU - Menary, Stephen

AU - Munoz Sanchez, Francisca

AU - Oh, Alexander

AU - Orgill, Emily

AU - Pater, Joleen

AU - Peters, Yvonne

AU - Pilkington, Andrew

AU - Price, Darren

AU - Qin, Yang

AU - Rawling, Jacob

AU - Scharmberg, Nicolas

AU - Shaw, Savanna

AU - Watts, Stephen

AU - Wyatt, Terence

AU - The ATLAS Collaboration,

PY - 2019/3

Y1 - 2019/3

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 804ℓ <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 804ℓ <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

U2 - 10.1140/epjc/s10052-019-6650-6

DO - 10.1140/epjc/s10052-019-6650-6

M3 - Article

SN - 1434-6044

VL - 79

JO - European Physical Journal C

JF - European Physical Journal C

IS - 205

ER -

Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016

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Keywords

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