Measurement of jet activity produced in top-quark events with an electron, a muon and two <i>b</i>-tagged jets in the final state in <i>pp</i> 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 <i>b</i>-tagged jets in the final state in <i>pp</i> collisions √s=13TeV with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 77 (4). 220-.

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Abstract

Measurements of jet activity in top-quark pair events produced in proton-proton collisions are presented, using 3.2 fb[Formula: see text] of <i>pp</i> 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 [Formula: see text] pair and two <i>b</i>-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, [Formula: see text]. 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 [Formula: see text] threshold for additional jets, and is also presented for different invariant mass regions of the [Formula: see text] 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: 12 Oct 2023 08:56
DOI: 10.1140/epjc/s10052-017-4766-0
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3007048