Inspire record | arXiv:1911.04813 [hep-ex]
The production of a prompt photon in association with a Z boson is studied in proton-proton collisions at a centre-of-mass energy $\sqrt{s}=$13 TeV. The analysis uses a data sample with an integrated luminosity of 139 fb$^{-1}$ collected by the ATLAS detector at the LHC from 2015 to 2018. The production cross-section for the process $pp \rightarrow \ell^+ \ell^- + \gamma + X$ ($\ell=e,\mu$) 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 $\ell^+\ell^-\gamma$ 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.
Inspire record | arXiv:1911.04813 [hep-ex]
Generated at Monday, 18. July 2022 11:13AM
