Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s = 8 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:10.1140/epjc/s10052-021-09371-7

Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s = 8 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

The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at √s = 8 TeV. The dataset corresponds to an integrated luminosity of 20.2 fb−1 , and was collected in 2012 by the ATLAS detector at the Large Hadron Collider at CERN. The analysis is performed in the single-lepton channel. Events are selected by requiring one isolated lepton (electron or muon) and at least three jets. A neural network is
trained to separate the t W signal from the dominant t ¯t background. The cross-section is extracted from a binned profile maximum-likelihood fit to a two-dimensional discriminant built from the neural-network output and the invariant mass of the hadronically decaying W boson. The measured cross-section is σt W = 26 ± 7 pb, in good agreement with the Standard Model expectation.

Original language	English
Article number	720
Pages (from-to)	1-29
Number of pages	29
Journal	The European Physical Journal C
Volume	81
Issue number	8
DOIs	https://doi.org/10.1140/epjc/s10052-021-09371-7
Publication status	Published - 10 Aug 2021

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10.1140/epjc/s10052-021-09371-7Licence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2007.01554

3 Finished
3 Active

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

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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. (2021). Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s = 8 TeV with the ATLAS detector. The European Physical Journal C, 81(8), 1-29. Article 720. https://doi.org/10.1140/epjc/s10052-021-09371-7

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abstract = "The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at √s = 8 TeV. The dataset corresponds to an integrated luminosity of 20.2 fb−1 , and was collected in 2012 by the ATLAS detector at the Large Hadron Collider at CERN. The analysis is performed in the single-lepton channel. Events are selected by requiring one isolated lepton (electron or muon) and at least three jets. A neural network istrained to separate the t W signal from the dominant t ¯t background. The cross-section is extracted from a binned profile maximum-likelihood fit to a two-dimensional discriminant built from the neural-network output and the invariant mass of the hadronically decaying W boson. The measured cross-section is σt W = 26 ± 7 pb, in good agreement with the Standard Model expectation.",

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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 2021, 'Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s = 8 TeV with the ATLAS detector', The European Physical Journal C, vol. 81, no. 8, 720, pp. 1-29. https://doi.org/10.1140/epjc/s10052-021-09371-7

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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.

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AB - The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at √s = 8 TeV. The dataset corresponds to an integrated luminosity of 20.2 fb−1 , and was collected in 2012 by the ATLAS detector at the Large Hadron Collider at CERN. The analysis is performed in the single-lepton channel. Events are selected by requiring one isolated lepton (electron or muon) and at least three jets. A neural network istrained to separate the t W signal from the dominant t ¯t background. The cross-section is extracted from a binned profile maximum-likelihood fit to a two-dimensional discriminant built from the neural-network output and the invariant mass of the hadronically decaying W boson. The measured cross-section is σt W = 26 ± 7 pb, in good agreement with the Standard Model expectation.

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ER -

Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s = 8 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