Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector

ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration

doi:10.1140/epjc/s10052-020-7907-9

Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector

ATLAS Collaboration
, ATLAS Collaboration
, ATLAS Collaboration
, ATLAS Collaboration
, ATLAS Collaboration

University Politehnica of Bucharest
iThemba Labs
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University of South Africa
Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia
NOVA University Lisbon
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Universidad Andrés Bello
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University of Oklahoma
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88 Citations (Scopus)

Abstract

The inclusive top quark pair (tt¯) production cross-section σ_t _t¯ has been measured in proton–proton collisions at s=13TeV, using 36.1 fb^{- 1} of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ pair and b-tagged jets, the cross-section is measured to be: σtt¯=826.4±3.6(stat)±11.5(syst)±15.7(lumi)±1.9(beam)pb,where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mtpole, giving mtpole=173.1-2.1+2.0GeV. It is also combined with measurements at s=7TeV and s=8TeV to derive ratios and double ratios of tt¯ and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.

Original language	English
Article number	528
Journal	European Physical Journal C
Volume	80
Issue number	6
DOIs	https://doi.org/10.1140/epjc/s10052-020-7907-9
Publication status	Published - 1 Jun 2020

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-020-7907-9

Cite this

ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration, & ATLAS Collaboration (2020). Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector. European Physical Journal C, 80(6), Article 528. https://doi.org/10.1140/epjc/s10052-020-7907-9

@article{040e526d263748088d3eff53fb647546,

title = "Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector",

abstract = "The inclusive top quark pair (tt¯) production cross-section σt t¯ has been measured in proton–proton collisions at s=13TeV, using 36.1 fb- 1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ pair and b-tagged jets, the cross-section is measured to be: σtt¯=826.4±3.6(stat)±11.5(syst)±15.7(lumi)±1.9(beam)pb,where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4\%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mtpole, giving mtpole=173.1-2.1+2.0GeV. It is also combined with measurements at s=7TeV and s=8TeV to derive ratios and double ratios of tt¯ and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.",

author = "\{ATLAS Collaboration\} and \{ATLAS Collaboration\} and \{ATLAS Collaboration\} and \{ATLAS Collaboration\} and \{ATLAS Collaboration\} and G. Aad and B. Abbott and Abbott, \{D. C.\} and Abud, \{A. Abed\} and K. Abeling and Abhayasinghe, \{D. K.\} and Abidi, \{S. H.\} and AbouZeid, \{O. S.\} and Abraham, \{N. L.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and B. Achkar and S. Adachi and L. Adam and Bourdarios, \{C. Adam\} and L. Adamczyk and L. Adamek and J. Adelman and M. Adersberger and A. Adiguzel and S. Adorni and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agapopoulou and Agaras, \{M. N.\} and A. Aggarwal and C. Agheorghiesei and Aguilar-Saavedra, \{J. A.\} and F. Ahmadov and Ahmed, \{W. S.\} and X. Ai and G. Aielli and S. Akatsuka and {\AA}kesson, \{T. P.A.\} and E. Akilli and Akimov, \{A. V.\} and Khoury, \{K. Al\} and Alberghi, \{G. L.\} and J. Albert and Verzini, \{M. J.Alconada\} and S. Alderweireldt and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and Connell, \{S. H.\} and N. Govender and L. Truong",

note = "Publisher Copyright: {\textcopyright} 2020, CERN for the benefit of the ATLAS collaboration.",

year = "2020",

month = jun,

day = "1",

doi = "10.1140/epjc/s10052-020-7907-9",

language = "English",

volume = "80",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "6",

}

ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration & ATLAS Collaboration 2020, 'Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector', European Physical Journal C, vol. 80, no. 6, 528. https://doi.org/10.1140/epjc/s10052-020-7907-9

Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector. / ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration et al.
In: European Physical Journal C, Vol. 80, No. 6, 528, 01.06.2020.

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

TY - JOUR

T1 - Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abbott, D. C.

AU - Abud, A. Abed

AU - Abeling, K.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - AbouZeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Achkar, B.

AU - Adachi, S.

AU - Adam, L.

AU - Bourdarios, C. Adam

AU - Adamczyk, L.

AU - Adamek, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adorni, S.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agapopoulou, C.

AU - Agaras, M. N.

AU - Aggarwal, A.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Ahmed, W. S.

AU - Ai, X.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Khoury, K. Al

AU - Alberghi, G. L.

AU - Albert, J.

AU - Verzini, M. J.Alconada

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Connell, S. H.

AU - Govender, N.

AU - Truong, L.

PY - 2020/6/1

Y1 - 2020/6/1

N2 - The inclusive top quark pair (tt¯) production cross-section σt t¯ has been measured in proton–proton collisions at s=13TeV, using 36.1 fb- 1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ pair and b-tagged jets, the cross-section is measured to be: σtt¯=826.4±3.6(stat)±11.5(syst)±15.7(lumi)±1.9(beam)pb,where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mtpole, giving mtpole=173.1-2.1+2.0GeV. It is also combined with measurements at s=7TeV and s=8TeV to derive ratios and double ratios of tt¯ and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.

AB - The inclusive top quark pair (tt¯) production cross-section σt t¯ has been measured in proton–proton collisions at s=13TeV, using 36.1 fb- 1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge eμ pair and b-tagged jets, the cross-section is measured to be: σtt¯=826.4±3.6(stat)±11.5(syst)±15.7(lumi)±1.9(beam)pb,where the uncertainties reflect the limited size of the data sample, experimental and theoretical systematic effects, the integrated luminosity, and the LHC beam energy, giving a total uncertainty of 2.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. It is used to determine the top quark pole mass via the dependence of the predicted cross-section on mtpole, giving mtpole=173.1-2.1+2.0GeV. It is also combined with measurements at s=7TeV and s=8TeV to derive ratios and double ratios of tt¯ and Z cross-sections at different energies. The same event sample is used to measure absolute and normalised differential cross-sections as functions of single-lepton and dilepton kinematic variables, and the results are compared with predictions from various Monte Carlo event generators.

UR - https://www.scopus.com/pages/publications/85086475740

U2 - 10.1140/epjc/s10052-020-7907-9

DO - 10.1140/epjc/s10052-020-7907-9

M3 - Article

AN - SCOPUS:85086475740

SN - 1434-6044

VL - 80

JO - European Physical Journal C

JF - European Physical Journal C

IS - 6

M1 - 528

ER -

Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s=13TeV with the ATLAS detector

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