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



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H
et al (show 2878 more authors) (2018) Measurements of <i>t</i>(<i>t</i>)over-bar differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in <i>pp</i> collisions at √s=13 Te V using the ATLAS detector. PHYSICAL REVIEW D, 98 (1). 012003-.

Access the full-text of this item by clicking on the Open Access link.

Abstract

Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and $t\bar{t}$ system kinematic observables using proton--proton collisions at a center-of-mass energy of $\sqrt{s} = 13$ 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 $p_{\rm T} > 500$ GeV and a second with $p_{\rm T}>350$ 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 $\chi^2$ values. The cross-section for $t\bar{t}$ production in the fiducial phase-space region is $292 \pm 7 \ \rm{(stat)} \pm 76 \rm{(syst)}$ fb, to be compared to the theoretical prediction of $384 \pm 36$ fb.

Item Type: Article
Additional Information: 57 pages in total, author list starting page 41, 18 figures, 5 tables, submitted to PRD. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2016-09/
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 20 Aug 2018 09:34
Last Modified: 10 Oct 2023 23:24
DOI: 10.1103/PhysRevD.98.012003
Open Access URL: https://journals.aps.org/prd/abstract/10.1103/Phys...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3025283