Measurement of the cross-sections of the electroweak and total production of a Z γ pair in association with two jets in pp collisions at√s = 13 TeV with the ATLAS detector

ATLAS Publications; J.F. Allen; T.M. Carter; D. Duda; J.M. Gargan; R.Y. Gonzalez Andana; A. Hasib; V.A. Parrish; E.A. Pender; T. Qiu; E.P. Takeva; N. Themistokleous; E.M. Villhauer; Z. Xu; E. Zaid

doi:10.1016/j.physletb.2023.138222

Measurement of the cross-sections of the electroweak and total production of a Z γ pair in association with two jets in pp collisions at√s = 13 TeV with the ATLAS detector

ATLAS Publications, J.F. Allen, T.M. Carter, D. Duda, J.M. Gargan, R.Y. Gonzalez Andana, A. Hasib, V.A. Parrish, E.A. Pender, T. Qiu, E.P. Takeva, N. Themistokleous, E.M. Villhauer, Z. Xu, E. Zaid

School of Physics and Astronomy

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

Abstract / Description of output

This Letter presents the measurement of the fiducial and differential cross-sections of the electroweak production of a Z γ pair in association with two jets. The analysis uses 140 fb−1 of LHC proton–proton collision data taken at √s=13 TeV recorded by the ATLAS detector during the years 2015–2018. Events
with a Z boson candidate decaying into either an e+e− or μ+μ− pair, a photon and two jets are selected. The electroweak component is extracted by requiring a large dijet invariant mass and by using the information about the centrality of the system and is measured with an observed and expected significance well above five standard deviations. The fiducial pp → Z γ j j cross-section for the electroweak production is measured to be 3.6 ± 0.5 fb. The total fiducial cross-section that also includes contributions where the jets arise from strong interactions is measured to be 16.8+2.0−1.8 fb. The results are consistent
with the Standard Model predictions. Differential cross-sections are also measured using the same events and are compared with parton-shower Monte Carlo simulations. Good agreement is observed between data and predictions.

Original language	English
Article number	138222
Pages (from-to)	1-30
Number of pages	30
Journal	Physics Letters B
Volume	846
DOIs	https://doi.org/10.1016/j.physletb.2023.138222
Publication status	Published - 10 Nov 2023

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http://arxiv.org/abs/2305.19142

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3 Active

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P.
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/10/22 → 30/09/25
Project: Research

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ATLAS Publications, Allen, J. F., Carter, T. M., Duda, D., Gargan, J. M., Gonzalez Andana, R. Y., Hasib, A., Parrish, V. A., Pender, E. A., Qiu, T., Takeva, E. P., Themistokleous, N., Villhauer, E. M., Xu, Z., & Zaid, E. (2023). Measurement of the cross-sections of the electroweak and total production of a Z γ pair in association with two jets in pp collisions at√s = 13 TeV with the ATLAS detector. Physics Letters B, 846, 1-30. Article 138222. https://doi.org/10.1016/j.physletb.2023.138222

@article{822f13c876844cd5bb4f075982afe345,

title = "Measurement of the cross-sections of the electroweak and total production of a Z γ pair in association with two jets in pp collisions at√s = 13 TeV with the ATLAS detector",

abstract = "This Letter presents the measurement of the fiducial and differential cross-sections of the electroweak production of a Z γ pair in association with two jets. The analysis uses 140 fb−1 of LHC proton–proton collision data taken at √s=13 TeV recorded by the ATLAS detector during the years 2015–2018. Eventswith a Z boson candidate decaying into either an e+e− or μ+μ− pair, a photon and two jets are selected. The electroweak component is extracted by requiring a large dijet invariant mass and by using the information about the centrality of the system and is measured with an observed and expected significance well above five standard deviations. The fiducial pp → Z γ j j cross-section for the electroweak production is measured to be 3.6 ± 0.5 fb. The total fiducial cross-section that also includes contributions where the jets arise from strong interactions is measured to be 16.8+2.0−1.8 fb. The results are consistentwith the Standard Model predictions. Differential cross-sections are also measured using the same events and are compared with parton-shower Monte Carlo simulations. Good agreement is observed between data and predictions.",

author = "{ATLAS Publications} and Clark, {Philip James} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, {Victoria Jane} and Liza Mijovic and Benjamin Wynne and Sara Alderweireldt and J.F. Allen and T.M. Carter and D. Duda and J.M. Gargan and {Gonzalez Andana}, R.Y. and A. Hasib and V.A. Parrish and E.A. Pender and T. Qiu and E.P. Takeva and N. Themistokleous and E.M. Villhauer and Z. Xu and E. Zaid",

year = "2023",

month = nov,

day = "10",

doi = "10.1016/j.physletb.2023.138222",

language = "English",

volume = "846",

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journal = "Physics Letters B",

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ATLAS Publications, Allen, JF, Carter, TM, Duda, D, Gargan, JM, Gonzalez Andana, RY, Hasib, A, Parrish, VA, Pender, EA, Qiu, T, Takeva, EP, Themistokleous, N, Villhauer, EM, Xu, Z & Zaid, E 2023, 'Measurement of the cross-sections of the electroweak and total production of a Z γ pair in association with two jets in pp collisions at√s = 13 TeV with the ATLAS detector', Physics Letters B, vol. 846, 138222, pp. 1-30. https://doi.org/10.1016/j.physletb.2023.138222

TY - JOUR

T1 - Measurement of the cross-sections of the electroweak and total production of a Z γ pair in association with two jets in pp collisions at√s = 13 TeV with the ATLAS detector

AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Alderweireldt, Sara

AU - Allen, J.F.

AU - Carter, T.M.

AU - Duda, D.

AU - Gargan, J.M.

AU - Gonzalez Andana, R.Y.

AU - Hasib, A.

AU - Parrish, V.A.

AU - Pender, E.A.

AU - Qiu, T.

AU - Takeva, E.P.

AU - Themistokleous, N.

AU - Villhauer, E.M.

AU - Xu, Z.

AU - Zaid, E.

PY - 2023/11/10

Y1 - 2023/11/10

N2 - This Letter presents the measurement of the fiducial and differential cross-sections of the electroweak production of a Z γ pair in association with two jets. The analysis uses 140 fb−1 of LHC proton–proton collision data taken at √s=13 TeV recorded by the ATLAS detector during the years 2015–2018. Eventswith a Z boson candidate decaying into either an e+e− or μ+μ− pair, a photon and two jets are selected. The electroweak component is extracted by requiring a large dijet invariant mass and by using the information about the centrality of the system and is measured with an observed and expected significance well above five standard deviations. The fiducial pp → Z γ j j cross-section for the electroweak production is measured to be 3.6 ± 0.5 fb. The total fiducial cross-section that also includes contributions where the jets arise from strong interactions is measured to be 16.8+2.0−1.8 fb. The results are consistentwith the Standard Model predictions. Differential cross-sections are also measured using the same events and are compared with parton-shower Monte Carlo simulations. Good agreement is observed between data and predictions.

AB - This Letter presents the measurement of the fiducial and differential cross-sections of the electroweak production of a Z γ pair in association with two jets. The analysis uses 140 fb−1 of LHC proton–proton collision data taken at √s=13 TeV recorded by the ATLAS detector during the years 2015–2018. Eventswith a Z boson candidate decaying into either an e+e− or μ+μ− pair, a photon and two jets are selected. The electroweak component is extracted by requiring a large dijet invariant mass and by using the information about the centrality of the system and is measured with an observed and expected significance well above five standard deviations. The fiducial pp → Z γ j j cross-section for the electroweak production is measured to be 3.6 ± 0.5 fb. The total fiducial cross-section that also includes contributions where the jets arise from strong interactions is measured to be 16.8+2.0−1.8 fb. The results are consistentwith the Standard Model predictions. Differential cross-sections are also measured using the same events and are compared with parton-shower Monte Carlo simulations. Good agreement is observed between data and predictions.

U2 - 10.1016/j.physletb.2023.138222

DO - 10.1016/j.physletb.2023.138222

M3 - Article

SN - 0370-2693

VL - 846

SP - 1

EP - 30

JO - Physics Letters B

JF - Physics Letters B

M1 - 138222

ER -

Measurement of the cross-sections of the electroweak and total production of a Z γ pair in association with two jets in pp collisions at√s = 13 TeV with the ATLAS detector

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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this