Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/115142
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Type: Journal article
Title: Measurements of fiducial cross-sections for t¯t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
Other Titles: Measurements of fiducial cross-sections for t -bar t production with one or two additional b-jets in pp collisions at root s = 8 TeV using the ATLAS detector
Author: Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
AbouZeid, O.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
Agatonovic-Jovin, T.
Agricola, J.
et al.
Citation: European Physical Journal C, 2016; 76(1):11-1-11-37
Publisher: Springer
Issue Date: 2016
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... [et al.] (The ATLAS Collaboration)
Abstract: Fiducial cross-sections for t¯t production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb⁻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¯t events with at least one additional b-jet is measured to be 950 ± 70 (stat.) +240−190 (syst.) fb in the lepton-plus-jets channel and 50 ± 10 (stat.) +15−10 (syst.) fb in the eμ 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¯t production with two additional b-jets to t¯t production with any two additional jets. All measurements are in good agreement with recent theory predictions.
Keywords: ATLAS Publications
Rights: © CERN for the benefit of the ATLAS collaboration 2016. This article is published with open access at Springerlink.com
RMID: 0030041803
DOI: 10.1140/epjc/s10052-015-3852-4
Appears in Collections:Physics publications

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