Measurement of jet activity produced in top-quark events with an electron, a muon and two b-tagged jets in the final state in pp collisions √s=13TeV with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H
et al (show 2837 more authors) (2017) Measurement of jet activity produced in top-quark events with an electron, a muon and two b-tagged jets in the final state in pp collisions √s=13TeV with the ATLAS detector EUROPEAN PHYSICAL JOURNAL C, 77 (4). 220-. ISSN 1434-6044, 1434-6052

[thumbnail of 1610.09978v1.pdf] Text
1610.09978v1.pdf - Author Accepted Manuscript

Download (1MB)
[thumbnail of admin] Text (admin)
2017-05-12T10:14:32Z.atom - Unspecified

Download (0B)

Abstract

Measurements of jet activity in top-quark pair events produced in proton–proton collisions are presented, using 3.2 fb- 1of pp collision data at a centre-of-mass energy of 13 TeV collected by the ATLAS experiment at the Large Hadron Collider. Events are chosen by requiring an opposite-charge eμ pair and two b-tagged jets in the final state. The normalised differential cross-sections of top-quark pair production are presented as functions of additional-jet multiplicity and transverse momentum, p<inf>T</inf>. The fraction of signal events that do not contain additional jet activity in a given rapidity region, the gap fraction, is measured as a function of the p<inf>T</inf>threshold for additional jets, and is also presented for different invariant mass regions of the eμbb¯ system. All measurements are corrected for detector effects and presented as particle-level distributions compared to predictions with different theoretical approaches for QCD radiation. While the kinematics of the jets from top-quark decays are described well, the generators show differing levels of agreement with the measurements of observables that depend on the production of additional jets.

Item Type: Article
Additional Information: 57 pages in total, author list starting page 41, 16 figures, 15 tables, submitted to EPJC, all figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2015-17
Uncontrolled Keywords: ATLAS Collaboration, ATLAS Collaboration, ATLAS Collaboration
Depositing User: Symplectic Admin
Date Deposited: 24 Apr 2017 06:50
Last Modified: 22 May 2026 17:06
DOI: 10.1140/epjc/s10052-017-4766-0
Related Websites:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3007048
Disclaimer: The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.