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Measurements of t(t)over-bar differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at root s=13 Te V using the ATLAS detector

ATLAS Collaboration, .; Aaboud, M; Aad, G; Abbott, B; Abdinov, O; Abeloos, B; Abidi, SH; ... Zwalinski, L; + view all (2018) Measurements of t(t)over-bar differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at root s=13 Te V using the ATLAS detector. Physical Review D , 98 (1) , Article 012003. 10.1103/PhysRevD.98.012003. Green open access

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Abstract

Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and t ¯ t system kinematic observables using proton-proton collisions at a center-of-mass energy of √ s = 13     TeV . The data set corresponds to an integrated luminosity of 36.1     fb − 1 , recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large-radius jets in the final state, one with transverse momentum p T > 500     GeV and a second with p T > 350     GeV , are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a b -tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated χ 2 values. The cross-section for t ¯ t production in the fiducial phase-space region is 292 ± 7 ( stat ) ± 71 ( syst )     fb , to be compared to the theoretical prediction of 384 ± 36     fb .

Type: Article
Title: Measurements of t(t)over-bar differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at root s=13 Te V using the ATLAS detector
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevD.98.012003
Publisher version: https://doi.org/10.1103/PhysRevD.98.012003
Language: English
Additional information: © 2018 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/10055355
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