Differential cross-section measurements of boosted top quarks at √(s) = 13 TeV with the ATLAS detector

2017/02/28 by Michael James Fenton, Fenton, Michael James
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.1702.08728

4 pages, 4 figures, Top2016

arxiv created 2017/02/28 · arxiv updated 2017/03/01

Abstract

Differential cross-section measurements of highly boosted top quarks are presented. The dataset used has an integrated luminosity of 3.2 fb^-1, recorded at a centre-of-mass energy of √(s)=13 TeV with the ATLAS detector at the CERN Large Hadron Collider in 2015. Events are selected in the lepton + jets channel, containing one isolated lepton and a large radius jet that is identified as originating from a top quark using substructure tagging techniques. The measured transverse momentum and absolute rapidity distributions are unfolded to remove detector effects and compared to a range of Monte Carlo simulations. The transverse momentum distribution shows that all Monte Carlo generators used predict a harder spectrum than observed in data, while the rapidity distribution agrees well between MC and data.

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