Measurement of the $t\bar{t}W$ and $t\bar{t}Z$ production cross sections in $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$ with the ATLAS detector

ATLAS Collaboration

doi:10.1007/JHEP11(2015)172

Measurement of the $t\bar{t}W$ and $t\bar{t}Z$ production cross sections in $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$ with the ATLAS detector

ATLAS Collaboration

Physics and Astronomy

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

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Abstract

The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$. The dataset corresponds to an integrated luminosity of $20.3\ \mathrm{fb}^{-1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $t\bar{t}W$ and $t\bar{t}Z$ processes simultaneously yields a significance of $5.0\sigma$ ($4.2\sigma$) over the background-only hypothesis for $t\bar{t}W$ ($t\bar{t}Z$) production. The measured cross sections are $\sigma_{t\bar{t}W} = 369^{+100}_{-91}$ fb and $\sigma_{t\bar{t}Z} = 176^{+58}_{-52}$ fb. The background-only hypothesis with neither $t\bar{t}W$ nor $t\bar{t}Z$ production is excluded at $7.1\sigma$. All measurements are consistent with next-to-leading-order calculations for the $t\bar{t}W$ and $t\bar{t}Z$ processes.

Original language	English
Journal	Journal of High Energy Physics
Volume	172
DOIs	https://doi.org/10.1007/JHEP11(2015)172
Publication status	Published - 17 Sept 2015

Bibliographical note

31 pages plus author list + cover pages (47 pages total), 11 figures,8 tables, submitted to JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-05/

Keywords

hep-ex

Access to Document

10.1007/JHEP11(2015)172Licence: Creative Commons: Attribution (CC BY)

pdfSubmitted manuscript, 1.16 MBLicence: Creative Commons: Attribution (CC BY)

PPGP Capital Equipment Call
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/13 → 30/09/14
Project: Research Councils
ATLAS - UK Tracker Upgrade
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 30/09/13
Project: Research Councils
2012 Consolidated Grant Supplement
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 31/03/14
Project: Research Councils
Birmimgham Experimental Particle Physics Consolidated Grant
Newman, P. (Principal Investigator), Charlton, D. (Co-Investigator), Hawkes, C. (Co-Investigator), Lazzeroni, C. (Co-Investigator), Nikolopoulos, K. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator) & Wilson, J. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 30/09/16
Project: Research Councils
Wakeham Efficiency Saving PP
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
9/03/12 → 31/03/12
Project: Research Councils
Experimental Particle Physics 2009-2014
Newman, P. (Principal Investigator), Charlton, D. (Co-Investigator), Hawkes, C. (Co-Investigator), Watkins, P. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator), Wilson, J. (Co-Investigator) & Lazzeroni, C. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/09 → 30/09/12
Project: Research Councils
Experimental Particle Physics 2006-2011
Watkins, P. (Principal Investigator), Charlton, D. (Co-Investigator), Evans, P. (Co-Investigator), Hawkes, C. (Co-Investigator), Newman, P. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator) & Wilson, J. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/06 → 30/09/11
Project: Research Councils

Cite this

@article{d580742ef00a4591869b04602c7e1bfa,

title = "Measurement of the $t\bar{t}W$ and $t\bar{t}Z$ production cross sections in $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$ with the ATLAS detector",

abstract = "The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$. The dataset corresponds to an integrated luminosity of $20.3\ \mathrm{fb}^{-1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $t\bar{t}W$ and $t\bar{t}Z$ processes simultaneously yields a significance of $5.0\sigma$ ($4.2\sigma$) over the background-only hypothesis for $t\bar{t}W$ ($t\bar{t}Z$) production. The measured cross sections are $\sigma_{t\bar{t}W} = 369^{+100}_{-91}$ fb and $\sigma_{t\bar{t}Z} = 176^{+58}_{-52}$ fb. The background-only hypothesis with neither $t\bar{t}W$ nor $t\bar{t}Z$ production is excluded at $7.1\sigma$. All measurements are consistent with next-to-leading-order calculations for the $t\bar{t}W$ and $t\bar{t}Z$ processes.",

keywords = "hep-ex",

author = "{ATLAS Collaboration} and Paul Newman and Philip Allport and {Aperio Bella}, Ludovica and Matthew Baca and Juraj Bracinik and David Charlton and Andrew Chisholm and Grzegorz Gach and Christopher Hawkes and Simon Head and Stephen Hillier and Mark Levy and Richard Mudd and {Murillo Quijada}, Javier and Konstantinos Nikolopoulos and Rhys Owen and Mark Slater and Jurgen Thomas and Paul Thompson and Andrew Daniells and Alan Watson and Miriam Watson and John Wilson",

note = "31 pages plus author list + cover pages (47 pages total), 11 figures,8 tables, submitted to JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-05/",

year = "2015",

month = sep,

day = "17",

doi = "10.1007/JHEP11(2015)172",

language = "English",

volume = "172",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer",

}

TY - JOUR

T1 - Measurement of the $t\bar{t}W$ and $t\bar{t}Z$ production cross sections in $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$ with the ATLAS detector

AU - ATLAS Collaboration

AU - Newman, Paul

AU - Allport, Philip

AU - Aperio Bella, Ludovica

AU - Baca, Matthew

AU - Bracinik, Juraj

AU - Charlton, David

AU - Chisholm, Andrew

AU - Gach, Grzegorz

AU - Hawkes, Christopher

AU - Head, Simon

AU - Hillier, Stephen

AU - Levy, Mark

AU - Mudd, Richard

AU - Murillo Quijada, Javier

AU - Nikolopoulos, Konstantinos

AU - Owen, Rhys

AU - Slater, Mark

AU - Thomas, Jurgen

AU - Thompson, Paul

AU - Daniells, Andrew

AU - Watson, Alan

AU - Watson, Miriam

AU - Wilson, John

N1 - 31 pages plus author list + cover pages (47 pages total), 11 figures,8 tables, submitted to JHEP, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2013-05/

PY - 2015/9/17

Y1 - 2015/9/17

N2 - The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$. The dataset corresponds to an integrated luminosity of $20.3\ \mathrm{fb}^{-1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $t\bar{t}W$ and $t\bar{t}Z$ processes simultaneously yields a significance of $5.0\sigma$ ($4.2\sigma$) over the background-only hypothesis for $t\bar{t}W$ ($t\bar{t}Z$) production. The measured cross sections are $\sigma_{t\bar{t}W} = 369^{+100}_{-91}$ fb and $\sigma_{t\bar{t}Z} = 176^{+58}_{-52}$ fb. The background-only hypothesis with neither $t\bar{t}W$ nor $t\bar{t}Z$ production is excluded at $7.1\sigma$. All measurements are consistent with next-to-leading-order calculations for the $t\bar{t}W$ and $t\bar{t}Z$ processes.

AB - The production cross sections of top-quark pairs in association with massive vector bosons have been measured using data from $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$. The dataset corresponds to an integrated luminosity of $20.3\ \mathrm{fb}^{-1}$ collected by the ATLAS detector in 2012 at the LHC. Final states with two, three or four leptons are considered. A fit to the data considering the $t\bar{t}W$ and $t\bar{t}Z$ processes simultaneously yields a significance of $5.0\sigma$ ($4.2\sigma$) over the background-only hypothesis for $t\bar{t}W$ ($t\bar{t}Z$) production. The measured cross sections are $\sigma_{t\bar{t}W} = 369^{+100}_{-91}$ fb and $\sigma_{t\bar{t}Z} = 176^{+58}_{-52}$ fb. The background-only hypothesis with neither $t\bar{t}W$ nor $t\bar{t}Z$ production is excluded at $7.1\sigma$. All measurements are consistent with next-to-leading-order calculations for the $t\bar{t}W$ and $t\bar{t}Z$ processes.

KW - hep-ex

U2 - 10.1007/JHEP11(2015)172

DO - 10.1007/JHEP11(2015)172

M3 - Article

SN - 1126-6708

VL - 172

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

ER -

Measurement of the $t\bar{t}W$ and $t\bar{t}Z$ production cross sections in $pp$ collisions at $\sqrt{s} = 8 \mathrm{\ Te\kern -0.1em V}$ with the ATLAS detector

Abstract

Bibliographical note

Keywords

Access to Document

Fingerprint

Projects

PPGP Capital Equipment Call

ATLAS - UK Tracker Upgrade

2012 Consolidated Grant Supplement

Birmimgham Experimental Particle Physics Consolidated Grant

Wakeham Efficiency Saving PP

Experimental Particle Physics 2009-2014

Experimental Particle Physics 2006-2011

Cite this