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Identification of high transverse momentum top quarks in pp collisions at s=8 TeV with the ATLAS detector

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ATLAS Collaboration (Including: Beckingham, M., Farrington, Sinead, Harrison, P. F., Jeske, C., Jones, G. (Graham), Martin, T. A., Murray, W., Pianori, E. and Spangenberg, Martin). (2016) Identification of high transverse momentum top quarks in pp collisions at s=8 TeV with the ATLAS detector. Journal of High Energy Physics, 2016 (6). 93. doi:10.1007/jhep06(2016)093

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Official URL: https://doi.org/10.1007/jhep06(2016)093

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Abstract

This paper presents studies of the performance of several jet-substructure techniques, which are used to identify hadronically decaying top quarks with high transverse momentum contained in large-radius jets. The efficiency of identifying top quarks is measured using a sample of top-quark pairs and the rate of wrongly identifying jets from other quarks or gluons as top quarks is measured using multijet events collected with the ATLAS experiment in 20.3 fb−1 of 8 TeV proton-proton collisions at the Large Hadron Collider. Predictions from Monte Carlo simulations are found to provide an accurate description of the performance. The techniques are compared in terms of signal efficiency and background rejection using simulations, covering a larger range in jet transverse momenta than accessible in the dataset. Additionally, a novel technique is developed that is optimized to reconstruct top quarks in events with many jets.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
SWORD Depositor: Library Publications Router
Journal or Publication Title: Journal of High Energy Physics
Publisher: Springer Berlin Heidelberg
ISSN: 1029-8479
Official Date: 16 June 2016
Dates:
DateEvent
16 June 2016Published
9 June 2016Accepted
Volume: 2016
Number: 6
Article Number: 93
DOI: 10.1007/jhep06(2016)093
Status: Peer Reviewed
Publication Status: Published
Publisher Statement: ** From Springer Nature via Jisc Publications Router. ** History: ** received: 11-03-2016 ** collection: 01-06-2016 ** rev-recd: 03-06-2016 ** accepted: 09-06-2016 ** epub: 16-06-2016
Access rights to Published version: Open Access

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