Please use this identifier to cite or link to this item: https://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.S.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.S.
Adamczyk, L.
Adams, D.L.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.A.
Agatonovic-Jovin, T.
Agricola, J.
et al.
Citation: European Physical Journal C: Particles and Fields, 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. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecomm ons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3.
DOI: 10.1140/epjc/s10052-015-3852-4
Grant ID: ARC
Published version: http://dx.doi.org/10.1140/epjc/s10052-015-3852-4
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