Atıf İçin Kopyala
Aad G., Abbott B., Abbott D. C., Abud A. A., Abeling K., Abhayasinghe D. K., ...Daha Fazla
EUROPEAN PHYSICAL JOURNAL C, cilt.80, sa.6, 2020 (SCI-Expanded)
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Yayın Türü:
Makale / Tam Makale
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Cilt numarası:
80
Sayı:
6
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Basım Tarihi:
2020
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Doi Numarası:
10.1140/epjc/s10052-020-7907-9
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Dergi Adı:
EUROPEAN PHYSICAL JOURNAL C
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Derginin Tarandığı İndeksler:
Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, INSPEC, zbMATH, Directory of Open Access Journals
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İstanbul Üniversitesi Adresli:
Evet
Özet
The inclusive top quark pair (tt) production cross-section sigma tt 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 e mu pair and b-tagged jets, the cross-section is measured to be: sigma tt=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.