0484449 - FZÚ 2018 RIV NL eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Havránek, Miroslav - Hejbal, Jiří - Jakoubek, Tomáš - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Vrba, Václav … Total 2855 authors
Measurement of the tt¯production cross-section using eμ events with b-tagged jets in ppcollisions at √s = 13 TeV with the ATLAS detector.
Physics Letters. B. Roč. 761, Oct (2016), s. 136-157. ISSN 0370-2693. E-ISSN 1873-2445
Institutional support: RVO:68378271
Keywords : track data analysis * experimental results * 13000 GeV-cms * ATLAS * CERN
OECD category: Particles and field physics
Impact factor: 4.807, year: 2016 ; AIS: 1.553, rok: 2016
DOI: https://doi.org/10.1016/j.physletb.2016.08.019

This paper describes a measurement of the inclusive top quark pair production cross-section ( σtt¯ ) with a data sample of 3.2fb−1 of proton–proton collisions at a centre-of-mass energy of $sqrt s%=13TeV , collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b -quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b -tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b -tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt¯=818±8(stat)±27(syst)±19(lumi)±12(beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%.



Permanent Link: http://hdl.handle.net/11104/0279613