Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). 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. European physical journal. C - particles and fields, 76(1) EDP Sciences 10.1140/epjc/s10052-015-3852-4
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1508.06868.pdf - Accepted Version Available under License Creative Commons: Attribution (CC-BY). Download (1MB) | Preview |
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10.1140_epjc_s10052-015-3852-4.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (2MB) | Preview |
Fiducial cross-sections for tt 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 tt 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 tt production with two additional b -jets to tt production with any two additional jets. All measurements are in good agreement with recent theory predictions.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics 500 Science > 510 Mathematics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
16 Aug 2017 15:42 |
Last Modified: |
05 Dec 2022 15:05 |
Publisher DOI: |
10.1140/epjc/s10052-015-3852-4 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.100026 |
URI: |
https://boris.unibe.ch/id/eprint/100026 |
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