CERN Accelerating science

ATLAS Slides
Report number	ATL-PHYS-SLIDE-2019-818
Title	Single- and and double-differential cross-sections in ttbar final states in the lepton+jets channel
Author(s)	Kvita, Jiri (Palacky University, RCPTM)
Corporate author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Submitted to	12th International Workshop on Top Quark Physics, Beijing, China, 22 - 27 Sep 2019
Submitted by	[email protected] on 29 Oct 2019
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	top quark pair production ; single differential cross sections ; double differential cross sections ; boosted regime ; resolved regime ; particle level ; parton level ; TOP
Abstract	We present measurements of single- and double-differential cross-sections in ttbar final states in the lepton+jets channel, unfolded to particle and parton levels with both resolved and boosted topologies considered. Fully corrected spectra are presented as functions of the top-quark as well as and ttbar system kinematic variables and jet multiplicities in data from pp collisions at sqrt(s)=13 TeV collected in 2015 and 2016 by the ATLAS detector at the LHC, corresponding to integrated luminosity of 36 fb-1 . Measurements provided detailed information on the top-quark production and decay, enabling precision tests of modern Monte Carlo generators as well as latest fixed-order Standard Model predictions. Good agreement between the theoretical predictions and the data is observed within reduced systematic uncertainties w.r.t. previous ATLAS measurements.