Measurements of tt¯ differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at √s=13 TeV using the ATLAS detector

, The ATLAS collaboration (2018) Measurements of tt¯ differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at √s=13 TeV using the ATLAS detector. Physical Review D, 98 (1). ISSN 1550-7998

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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-ofmass energy of ffiffi s p ¼ 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 largeradius jets in the final state, one with transverse momentum pT > 500 GeV and a second with pT > 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 χ2 values. The crosssection for t¯t production in the fiducial phase-space region is 292 7ðstatÞ 71ðsystÞ fb, to be compared to the theoretical prediction of 384 36 fb.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review D
ID Code:
128033
Deposited By:
Deposited On:
04 Oct 2018 15:18
Refereed?:
Yes
Published?:
Published
Last Modified:
28 Oct 2020 06:49