Measurement of Zγ γ production in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications, T.M. Carter, R.Y. Gonzalez Andana, A. Hasib, M.P. Heath, V.A. Parrish, E.A. Pender, E.P. Takeva, N. Themistokleous, E.M. Villhauer, E. Zaid

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Cross-sections for the production of a Z boson in association with two photons are measured in proton–proton collisions at a centre-of-mass energy of 13 TeV. The data used correspond to an integrated luminosity of 139 fb−1 recorded
by the ATLAS experiment during Run 2 of the LHC. The measurements use the electron and muon decay channels of the Z boson, and a fiducial phase-space region where the photons are not radiated from the leptons. The integrated
Z (→ )γ γ cross-section is measured with a precision of 12% and differential cross-sections are measured as a function of six kinematic variables of the Z γ γ system. The data are compared with predictions from MC event generators
which are accurate to up to next-to-leading order in QCD. The cross-section measurements are used to set limits on the coupling strengths of dimension-8 operators in the framework of an effective field theory.
Original languageEnglish
Article number539
Pages (from-to)1-30
Number of pages30
JournalThe European Physical Journal C
Volume83
Issue number6
DOIs
Publication statusPublished - 27 Jun 2023

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