Measurement of the Z(→ ℓ⁺ℓ¯)γ production cross-section in pp collisions at √s = 13 TeV with the ATLAS detector Aad, G. Aguilar Saavedra, Juan Antonio Atlas Collaboration Hadron-Hadron scattering (experiments) The production of a prompt photon in association with a Z boson is studied in proton-proton collisions at a centre-of-mass energy √s = 13 TeV. The analysis uses a data sample with an integrated luminosity of 139 fb^{-1} ollected by the ATLAS detector at the LHC from 2015 to 2018. The production cross-section for the process pp → ℓ⁺ℓ¯γ X (ℓ = e, μ) is measured within a fiducial phase-space region defined by kinematic requirements on the photon and the leptons, and by isolation requirements on the photon. An experimental precision of 2.9% is achieved for the fiducial cross-section. Differential cross-sections are measured as a function of each of six kinematic variables characterising the ℓ⁺ℓ¯γ system. The data are compared with theoretical predictions based on next-to-leading-order and next-to-next-to-leading-order perturbative QCD calculations. The impact of next-to-leading-order electroweak corrections is also considered. 2020-04-14T11:50:13Z 2020-04-14T11:50:13Z 2020-03-10 info:eu-repo/semantics/article Aad, G., Abbott, B., Abbott, D. C., Abud, A. A., Abeling, K., Abhayasinghe, D. K., ... & Abreu, H. (2020). Measurement of the Z (→ ℓ+ ℓ−) γ production cross-section in pp collisions at s $$\sqrt {s} $$= 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2020(3), 1-52. http://hdl.handle.net/10481/61192 10.1007/JHEP03(2020)054 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España Springer Nature