Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications; M. Faucci Giannelli; A. Hasib; M.P. Heath; X. Hoad; S. Palazzo; A. Søgaard; A. Strubig; E.P. Takeva; A.J. Taylor; A. Washbrook

doi:10.1007/JHEP07(2020)124

Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications, M. Faucci Giannelli, A. Hasib, M.P. Heath, X. Hoad, S. Palazzo, A. Søgaard, A. Strubig, E.P. Takeva, A.J. Taylor, A. Washbrook

School of Physics and Astronomy

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

Abstract

Single top-quark production in association with a Z boson, where the Z boson
decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from
t¯tZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for t`+`−q production, including nonresonant dilepton pairs with m`+`− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.

Original language	English
Article number	124
Pages (from-to)	1-45
Number of pages	45
Journal	Journal of High Energy Physics
Volume	2020
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2020)124
Publication status	Published - 20 Jul 2020

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http://arxiv.org/abs/2002.07546

1 Active
5 Finished

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

Cite this

ATLAS Publications, Faucci Giannelli, M., Hasib, A., Heath, M. P., Hoad, X., Palazzo, S., Søgaard, A., Strubig, A., Takeva, E. P., Taylor, A. J., & Washbrook, A. (2020). Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2020(7), 1-45. Article 124. https://doi.org/10.1007/JHEP07(2020)124

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title = "Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector",

abstract = "Single top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from t¯tZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for t`+`−q production, including nonresonant dilepton pairs with m`+`− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.",

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 \{Faucci Giannelli\}, M. and A. Hasib and M.P. Heath and X. Hoad and S. Palazzo and A. S{\o}gaard and A. Strubig and E.P. Takeva and A.J. Taylor and A. Washbrook",

year = "2020",

month = jul,

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doi = "10.1007/JHEP07(2020)124",

language = "English",

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ATLAS Publications, Faucci Giannelli, M, Hasib, A, Heath, MP, Hoad, X, Palazzo, S, Søgaard, A, Strubig, A, Takeva, EP, Taylor, AJ & Washbrook, A 2020, 'Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector', Journal of High Energy Physics, vol. 2020, no. 7, 124, pp. 1-45. https://doi.org/10.1007/JHEP07(2020)124

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T1 - Observation of the associated production of a top quark and a Z boson 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 - Faucci Giannelli, M.

AU - Hasib, A.

AU - Heath, M.P.

AU - Hoad, X.

AU - Palazzo, S.

AU - Søgaard, A.

AU - Strubig, A.

AU - Takeva, E.P.

AU - Taylor, A.J.

AU - Washbrook, A.

PY - 2020/7/20

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N2 - Single top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from t¯tZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for t`+`−q production, including nonresonant dilepton pairs with m`+`− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.

AB - Single top-quark production in association with a Z boson, where the Z boson decays to a pair of charged leptons, is measured in the trilepton channel. The proton-proton collision data collected by the ATLAS experiment from 2015 to 2018 at a centre-of-mass energy of 13 TeV are used, corresponding to an integrated luminosity of 139 fb−1. Events containing three isolated charged leptons (electrons or muons) and two or three jets, one of which is identified as containing a b-hadron, are selected. The main backgrounds are from t¯tZ and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for t`+`−q production, including nonresonant dilepton pairs with m`+`− > 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction.

U2 - 10.1007/JHEP07(2020)124

DO - 10.1007/JHEP07(2020)124

M3 - Article

SN - 1029-8479

VL - 2020

SP - 1

EP - 45

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 124

ER -

Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector

Abstract

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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