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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 at √s = 13 TeV with the ATLAS detector
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ATLAS Collaboration (Including: Beckingham, M., Ennis, Joseph Stanford, Farrington, Sinead, Harrison, P. F., Jeske, C., Jones, G., Martin, T. A., Murray, W., Pianori, E. and Spangenberg, Martin). (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 at √s = 13 TeV with the ATLAS detector. European Physical Journal C, 77 (4). 220. doi:10.1140/epjc/s10052-017-4766-0 ISSN 1434-6044.
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Official URL: http://doi.org/10.1140/epjc/s10052-017-4766-0
Abstract
Measurements of jet activity in top-quark pair events produced in proton–proton collisions are presented, using 3.2 fb-1 of 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, pT. 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 pT 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: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Journal or Publication Title: | European Physical Journal C | ||||||
| Publisher: | Springer | ||||||
| ISSN: | 1434-6044 | ||||||
| Official Date: | 7 April 2017 | ||||||
| Dates: |
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| Volume: | 77 | ||||||
| Number: | 4 | ||||||
| Article Number: | 220 | ||||||
| DOI: | 10.1140/epjc/s10052-017-4766-0 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Reuse Statement (publisher, data, author rights): | ** From Springer Nature via Jisc Publications Router. ** History: ** received: 02-11-2016 ** accepted: 20-03-2017 ** collection: 01-04-2017 ** epub: 07-04-2017 ** Licence for this article: http://creativecommons.org/licenses/by/4.0/ | ||||||
| Access rights to Published version: | Open Access (Creative Commons) |
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