Observation of the associated production of a top quark and a Z boson in pp collisions at √s = 13 TeV with the ATLAS detector
Aad, G ; Åkesson, Torsten LU
; Bocchetta, Simona
LU
; Bryngemark, Lene
LU
; Corrigan, Eric Edward
LU
; Doglioni, Caterina
LU
; Geisen, Jannik
LU
; Gregersen, Kristian
LU
; Brottmann Hansen, Eva
LU
and Hedberg, Vincent
LU
, et al.
(2020)
In Journal of High Energy Physics
2020(7).
- 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 tt¯ Z and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tℓ+ℓ−q production, including non-resonant dilepton pairs with mℓ+ℓ−> 30... (More)
- 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 tt¯ Z and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tℓ+ℓ−q production, including non-resonant dilepton pairs with mℓ+ℓ−> 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction. [Figure not available: see fulltext.] © 2020, The Author(s). (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/b7b4489b-d73e-4bd2-bbcb-b72e78e0548f
- author
- Aad, G
; Åkesson, Torsten
LU
; Bocchetta, Simona
LU
; Bryngemark, Lene
LU
; Corrigan, Eric Edward
LU
; Doglioni, Caterina
LU
; Geisen, Jannik
LU
; Gregersen, Kristian
LU
; Brottmann Hansen, Eva
LU
and Hedberg, Vincent
LU
, et al. (More)
- Aad, G
; Åkesson, Torsten
LU
; Bocchetta, Simona
LU
; Bryngemark, Lene
LU
; Corrigan, Eric Edward
LU
; Doglioni, Caterina
LU
; Geisen, Jannik
LU
; Gregersen, Kristian
LU
; Brottmann Hansen, Eva
LU
; Hedberg, Vincent
LU
; Jarlskog, Göran
LU
; Kellermann, Edgar
LU
; Konya, Balazs
LU
; Lytken, Else
LU
; Mankinen, Katja
LU
; Marcon, Caterina
LU
; Mjörnmark, Ulf
LU
; Mullier, Geoffrey André Adrien
LU
; Pöttgen, Ruth
LU
; Poulsen, Trine
LU
; Skorda, Eleni
LU
; Smirnova, Oxana
LU
and Zwalinski, L
(Less)
- author collaboration
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Hadron-Hadron scattering (experiments)
- in
- Journal of High Energy Physics
- volume
- 2020
- issue
- 7
- article number
- 124
- publisher
- Springer
- external identifiers
-
- scopus:85088394905
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP07(2020)124
- language
- English
- LU publication?
- yes
- id
- b7b4489b-d73e-4bd2-bbcb-b72e78e0548f
- date added to LUP
- 2020-08-04 14:51:29
- date last changed
- 2025-04-04 15:21:15
@article{b7b4489b-d73e-4bd2-bbcb-b72e78e0548f,
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 tt¯ Z and diboson production. Neural networks are used to improve the background rejection and extract the signal. The measured cross-section for tℓ+ℓ−q production, including non-resonant dilepton pairs with mℓ+ℓ−> 30 GeV, is 97 ± 13 (stat.) ± 7 (syst.) fb, consistent with the Standard Model prediction. [Figure not available: see fulltext.] © 2020, The Author(s).}},
author = {{Aad, G and Åkesson, Torsten and Bocchetta, Simona and Bryngemark, Lene and Corrigan, Eric Edward and Doglioni, Caterina and Geisen, Jannik and Gregersen, Kristian and Brottmann Hansen, Eva and Hedberg, Vincent and Jarlskog, Göran and Kellermann, Edgar and Konya, Balazs and Lytken, Else and Mankinen, Katja and Marcon, Caterina and Mjörnmark, Ulf and Mullier, Geoffrey André Adrien and Pöttgen, Ruth and Poulsen, Trine and Skorda, Eleni and Smirnova, Oxana and Zwalinski, L}},
issn = {{1029-8479}},
keywords = {{Hadron-Hadron scattering (experiments)}},
language = {{eng}},
number = {{7}},
publisher = {{Springer}},
series = {{Journal of High Energy Physics}},
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}},
url = {{http://dx.doi.org/10.1007/JHEP07(2020)124}},
doi = {{10.1007/JHEP07(2020)124}},
volume = {{2020}},
year = {{2020}},
}