Abstract
The inclusive top quark pair (tt¯) production cross-section σt t¯ has been measured in proton–proton collisions at s=13TeV, using 36.1fb- 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 | |
Publication status | Published - 1 Jun 2020 |
Externally published | Yes |
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University Politehnica of Bucharest, iThemba Labs, Department of Physics University of South Africa, Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia NOVA University Lisbon, & Department of Physics Universidad Andrés Bello (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
University Politehnica of Bucharest ; iThemba Labs ; Department of Physics University of South Africa et al. / 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. In: European Physical Journal C. 2020 ; Vol. 80, No. 6.
@article{45da8e845aa341eea356148896e5007a,
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 36.1fb- 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 = "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 T. Alexopoulos and A. Alfonsi and McNamara, {P. C.}",
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 = "Institute for Ionics",
number = "6",
}
University Politehnica of Bucharest, iThemba Labs, Department of Physics University of South Africa, Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia NOVA University Lisbon & Department of Physics Universidad Andrés Bello 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. / University Politehnica of Bucharest; iThemba Labs; Department of Physics University of South Africa 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 - 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 - Alexopoulos, T.
AU - Alfonsi, A.
AU - McNamara, P. C.
N1 - Publisher Copyright:© 2020, CERN for the benefit of the ATLAS collaboration.
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 36.1fb- 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 36.1fb- 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 - http://www.scopus.com/inward/record.url?scp=85086475740&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-020-7907-9
DO - 10.1140/epjc/s10052-020-7907-9
M3 - Article
SN - 1434-6044
VL - 80
JO - European Physical Journal C
JF - European Physical Journal C
IS - 6
M1 - 528
ER -
University Politehnica of Bucharest, iThemba Labs, Department of Physics University of South Africa, Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia NOVA University Lisbon, Department of Physics Universidad Andrés Bello. 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. 2020 Jun 1;80(6):528. doi: 10.1140/epjc/s10052-020-7907-9