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

G Aad; Torsten Åkesson; Simona Bocchetta; Lene Bryngemark; Eric Edward Corrigan; Caterina Doglioni; J Dolejsi; K. Gregersen; E. Hansen; Vincent Hedberg; J Hejbal; Göran Jarlskog; J Jejelava; Charles Kalderon; Edgar Kellermann; Balazs Konya; Else Lytken; Katja Mankinen; Caterina Marcon; Ulf Mjörnmark; Geoffrey André Adrien Mullier; Ruth Pöttgen; Trine Poulsen; Eleni Skorda; Oxana Smirnova; L Zwalinski; ATLAS Collaboration

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=8TeV with the ATLAS detector

G Aad, Torsten Åkesson, Simona Bocchetta, Lene Bryngemark, Eric Edward Corrigan, Caterina Doglioni, J Dolejsi, K. Gregersen, E. Hansen, Vincent Hedberg, J Hejbal, Göran Jarlskog, J Jejelava, Charles Kalderon, Edgar Kellermann, Balazs Konya, Else Lytken, Katja Mankinen, Caterina Marcon, Ulf MjörnmarkGeoffrey André Adrien Mullier, Ruth Pöttgen, Trine Poulsen, Eleni Skorda, Oxana Smirnova, L Zwalinski, ATLAS Collaboration

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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√=8TeV. The dataset corresponds to an integrated luminosity of 20.2fb−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 tW signal from the dominant tt¯ 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 σtW=26±7pb, in good agreement with the Standard Model expectation.

Original language	English
Article number	720
Journal	European Physical Journal C
Volume	81
Issue number	8
DOIs	https://doi.org/10.1140/epjc/s10052-021-09371-7
Publication status	Published - 2021

Subject classification (UKÄ)

Subatomic Physics

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Aad, G., Åkesson, T., Bocchetta, S., Bryngemark, L., Corrigan, E. E., Doglioni, C., Dolejsi, J., Gregersen, K., Hansen, E., Hedberg, V., Hejbal, J., Jarlskog, G., Jejelava, J., Kalderon, C., Kellermann, E., Konya, B., Lytken, E., Mankinen, K., Marcon, C., ... ATLAS Collaboration (2021). Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s=8TeV with the ATLAS detector. European Physical Journal C, 81(8), Article 720. https://doi.org/10.1140/epjc/s10052-021-09371-7

@article{4c66ed330c6c4418bdd907ebd5cb2277,

title = "Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s=8TeV with the ATLAS detector",

abstract = "The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at s√=8TeV. The dataset corresponds to an integrated luminosity of 20.2fb−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 tW signal from the dominant tt¯ 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 σtW=26±7pb, in good agreement with the Standard Model expectation.",

author = "G Aad and Torsten {\AA}kesson and Simona Bocchetta and Lene Bryngemark and Corrigan, {Eric Edward} and Caterina Doglioni and J Dolejsi and K. Gregersen and E. Hansen and Vincent Hedberg and J Hejbal and G{\"o}ran Jarlskog and J Jejelava and Charles Kalderon and Edgar Kellermann and Balazs Konya and Else Lytken and Katja Mankinen and Caterina Marcon and Ulf Mj{\"o}rnmark and Mullier, {Geoffrey Andr{\'e} Adrien} and Ruth P{\"o}ttgen and Trine Poulsen and Eleni Skorda and Oxana Smirnova and L Zwalinski and {ATLAS Collaboration}",

year = "2021",

doi = "10.1140/epjc/s10052-021-09371-7",

language = "English",

volume = "81",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer",

number = "8",

}

Aad, G, Åkesson, T, Bocchetta, S, Bryngemark, L, Corrigan, EE, Doglioni, C, Dolejsi, J, Gregersen, K, Hansen, E, Hedberg, V, Hejbal, J, Jarlskog, G, Jejelava, J, Kalderon, C, Kellermann, E, Konya, B , Lytken, E, Mankinen, K, Marcon, C, Mjörnmark, U, Mullier, GAA, Pöttgen, R, Poulsen, T, Skorda, E, Smirnova, O, Zwalinski, L & ATLAS Collaboration 2021, 'Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s=8TeV with the ATLAS detector', European Physical Journal C, vol. 81, no. 8, 720. https://doi.org/10.1140/epjc/s10052-021-09371-7

TY - JOUR

T1 - Measurement of single top-quark production in association with a W boson in the single-lepton channel at √s=8TeV with the ATLAS detector

AU - Aad, G

AU - Åkesson, Torsten

AU - Bocchetta, Simona

AU - Bryngemark, Lene

AU - Corrigan, Eric Edward

AU - Doglioni, Caterina

AU - Dolejsi, J

AU - Gregersen, K.

AU - Hansen, E.

AU - Hedberg, Vincent

AU - Hejbal, J

AU - Jarlskog, Göran

AU - Jejelava, J

AU - Kalderon, Charles

AU - Kellermann, Edgar

AU - Konya, Balazs

AU - Lytken, Else

AU - Mankinen, Katja

AU - Marcon, Caterina

AU - Mjörnmark, Ulf

AU - Mullier, Geoffrey André Adrien

AU - Pöttgen, Ruth

AU - Poulsen, Trine

AU - Skorda, Eleni

AU - Smirnova, Oxana

AU - Zwalinski, L

AU - ATLAS Collaboration

PY - 2021

Y1 - 2021

N2 - The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at s√=8TeV. The dataset corresponds to an integrated luminosity of 20.2fb−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 tW signal from the dominant tt¯ 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 σtW=26±7pb, in good agreement with the Standard Model expectation.

AB - The production cross-section of a top quark in association with a W boson is measured using proton–proton collisions at s√=8TeV. The dataset corresponds to an integrated luminosity of 20.2fb−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 tW signal from the dominant tt¯ 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 σtW=26±7pb, in good agreement with the Standard Model expectation.

U2 - 10.1140/epjc/s10052-021-09371-7

DO - 10.1140/epjc/s10052-021-09371-7

M3 - Article

SN - 1434-6044

VL - 81

JO - European Physical Journal C

JF - European Physical Journal C

IS - 8

M1 - 720

ER -

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

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