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Identification of high transverse momentum top quarks in pp collisions at root s=8 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 2875
2016 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 6, 093Article in journal (Refereed) PublishedText
Abstract [en]

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 8TeV 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.

Place, publisher, year, edition, pages
2016. no 6, 093
Keyword [en]
Hadron-Hadron scattering (experiments)
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-191024DOI: 10.1007/JHEP06(2016)093ISI: 000379177300001ScopusID: 2-s2.0-84978427420OAI: oai:DiVA.org:kth-191024DiVA: diva2:954617
Funder
Swedish Research CouncilEU, European Research CouncilEU, FP7, Seventh Framework Programme
Note

QC 20160823

Available from: 2016-08-23 Created: 2016-08-23 Last updated: 2016-08-23Bibliographically approved

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Lund-Jensen, BengtSidebo, EdvinStrandberg, Jonas
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