CERN Accelerating science

ATLAS Slides
Report number	ATL-PHYS-SLIDE-2018-202
Title	Measurements of ttbar+X using the ATLAS detector
Author(s)	Hasib, Ahmed (University of Edinburgh)
Corporate author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Submitted to	26th International Workshop on Deep Inelastic Scattering and Related Subjects (DIS 2018), Kobe, Hyogo, Japan, 16 - 20 Apr 2018
Submitted by	[email protected] on 26 Apr 2018
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	tt+X ; TOP
Abstract	The large centre-of-mass energy available at the proton-proton collider LHC allows for the copious production of top quark pairs in association with other final state particles at high transverse momenta. The ATLAS experiment has measured several final state observables that are sensitive to additional radiation in top anti-top quark final states. Results on the top production in association with W and Z bosons are presented as well as top pair production with a photon. Analyses probing top pair production with additional QCD radiation are also presented, including top pair production in association with additional heavy flavour jets. These measurements are compared to predictions of modern Monte Carlo generators based on NLO QCD matrix element or LO multi-leg matrix elements.