Measurements of fiducial cross-sections for t[bar over t] production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
Name
Measurements of fiducial.pdf
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2.42 MB
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Author(s)
Taylor, Frank E
Alternative Title
Measurements of fiducial cross-sections for tt ¯ production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
Date Issued
January 2016
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
ATLAS Publications et al. “Measurements of Fiducial Cross-Sections for t [bar over t] Production with One or Two Additional B-Jets in Pp Collisions at √s = 8 TeV Using the ATLAS Detector.” The European Physical Journal C 76.1 (2016): n. pag. © 2016 CERN for the benefit of the ATLAS collaboration
Version
Final published version
Abstract
Fiducial cross-sections for t[bar over t] production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb[superscript −1] of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for t[bar over t] events with at least one additional b-jet is measured to be 950 ±± 70 (stat.)[superscript +240][subscript −190] (syst.) fb in the lepton-plus-jets channel and 50 ±± 10 (stat.) [superscript +15][subscript −10] (syst.) fb in the eμeμ channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 ±± 3.5 (stat.) ±± 5.7 (syst.) fb in the dilepton channel (eμ, μμ, and ee) using a method based on tight selection criteria, and 13.5 ±± 3.3 (stat.) ±± 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 ±± 0.33 (stat.) ±± 0.28 (syst.)% for the ratio of t[bar over t] production with two additional b-jets to t[bar over t] production with any two additional jets. All measurements are in good agreement with recent theory predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-015-3852-4
