Search for Dark Photons in Rare Z Boson Decays with the ATLAS Detector

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review


A search for events with a dark photon produced in association with a dark Higgs boson via rare decays of the standard model Z boson is presented, using 139  fb^{-1} of sqrt[s]=13  TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider. The dark boson decays into a pair of dark photons, and at least two of the three dark photons must each decay into a pair of electrons or muons, resulting in at least two same-flavor opposite-charge lepton pairs in the final state. The data are found to be consistent with the background prediction, and upper limits are set on the dark photon's coupling to the dark Higgs boson times the kinetic mixing between the standard model photon and the dark photon, α_{D}ϵ^{2}, in the dark photon mass range of [5, 40] GeV except for the ϒ mass window [8.8, 11.1] GeV. This search explores new parameter space not previously excluded by other experiments.

Original languageEnglish
Pages (from-to)251801
Number of pages1
JournalPhysical Review Letters
Issue number25
Publication statusPublished - 22 Dec 2023

ASJC Scopus subject areas

  • General Physics and Astronomy


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