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

0535099 - FZÚ 2021 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2933 authors
Measurement of the tt¯ production cross-section and lepton differential distributions in eμ dilepton events from pp collisions at √s = 13 TeV with the ATLAS detector.
European Physical Journal C. Roč. 80, č. 6 (2020), s. 1-70, č. článku 528. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT(CZ) LTT17018
Research Infrastructure: CERN-CZ II - 90104
Institutional support: RVO:68378271
Keywords : ATLAS * CERN * LHC * numerical calculations * Monte Carlo
OECD category: Particles and field physics
Impact factor: 4.590, year: 2020
Method of publishing: Open access

The inclusive top quark pair (t tˉ) production cross-section σ t tˉ has been measured in proton–proton collisions at sqrt{s}=13, ext {TeV} s =13TeV, using 36.1 fb^{-1} −1 of data collected in 2015–2016 by the ATLAS experiment at the LHC. Using events with an opposite-charge emueμ pair and b-tagged jets, the cross-section is measured to be: egin{aligned} sigma _{t ar{t}} = 826.4 pm 3.6,mathrm {(stat)} pm 11.5,mathrm {(syst)} pm 15.7,mathrm {(lumi)} pm 1.9,mathrm {(beam)},mathrm {pb}, end{aligned} σ t tˉ =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.

Permanent Link: http://hdl.handle.net/11104/0313207