CERN Accelerating science

ATLAS Note
Report number	arXiv:2411.15261 ; ATL-PHYS-PROC-2024-108
Title	Measurements of inclusive and differential cross-sections of $t\bar{t}\gamma$ production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
Author(s)	Diez Pardos, Carmen (Universitaet Siegen (DE)) (+)
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2024
Imprint	20 Nov 2024
Number of pages	4
Note	4 pages, 2 figures, Poster at the 17th International Workshop on Top Quark Physics (Top2024), 22-27 September 2024
In:	17th International Workshop on Top Quark Physics, Saint Malo, France, 22 - 27 Sep 2024
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	top quark ; photon ; cross sections ; EFT ; TOP
Abstract	Cross-section measurements of the associated production of a top quark pair and a photon ($t\bar{t}\gamma$) are performed with an integrated luminosity of 140 fb$^{-1}$ of proton-proton collisions at a centre-of-mass energy of 13 TeV collected by the ATLAS detector at the LHC. The measurement focuses on $t\bar{t}\gamma$ topologies where the photon is radiated from an initial-state parton or one of the top quarks. The differential cross-sections are measured for variables characterising the photon, lepton and jet kinematics. The distribution of the photon transverse momentum is used to set limits on effective field theory operators related to the electroweak dipole moments of the top quark.
Copyright/License	preprint: (License: CC BY 4.0)

Corresponding record in: Inspire