Measurement of the t(t)over-bar production cross-section using e mu events with b-tagged jets in pp collisions at root s=13 TeV with the ATLAS detector
Volume
761
Pagination
136 - 157
Publisher
DOI
10.1016/j.physletb.2016.08.019
Journal
PHYSICS LETTERS B
ISSN
0370-2693
Metadata
Show full item recordAbstract
This paper describes a measurement of the inclusive top quark pair production cross-section () with a data sample of of proton–proton collisions at a centre-of-mass energy of , 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 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:
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%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented.
Authors
Aaboud, M; Aad, G; Abbott, B; Abdallah, J; Abdinov, O; Abeloos, B; Aben, R; AbouZeid, OS; Abraham, NL; Abramowicz, HCollections
- Particle Physics [971]
Licence information
Copyright statements
The following license files are associated with this item:
Except where otherwise noted, this item's license is described as This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.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.
Related items
Showing items related by title, author, creator and subject.
-
Impact of Bacillus Calmette-Guerin (BCG) vaccination on postoperative mortality in patients with perioperative SARS-CoV-2 infection
Tabiri, S; Kamarajah, SK; Nepogodiev, D; Li, E; Simoes, J; Sravanam, S; Owusu, SA; Mahama, H; Agyeman, YN; Arthur, J (2021) -
Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition).
Klionsky, DJ; Abdel-Aziz, AK; Abdelfatah, S; Abdellatif, M; Abdoli, A; Abel, S; Abeliovich, H; Abildgaard, MH; Abudu, YP; Acevedo-Arozena, A (2021-02-08)In 2008, we published the first set of guidelines for standardizing research in autophagy. Since then, this topic has received increasing attention, and many scientists have entered the field. Our knowledge base and relevant ... -
Death following pulmonary complications of surgery before and during the SARS-CoV-2 pandemic
McLean, KA; Kamarajah, SK; Chaudhry, D; Gujjuri, RR; Raubenheimer, K; Trout, I; AlAmeer, E; Creagh-Brown, B; Harrison, EM; Nepogodiev, D (2021)