Tumasyan, A.Adam, W.Bergauer, T.Dragicevic, M.Ero, J.Del Valle, A. EscalanteFruhwirth, R.2025-03-232025-03-2320221434-60441434-6052https://doi.org/10.1140/epjc/s10052-022-10127-0https://hdl.handle.net/11486/5243A search for low-mass dilepton resonances in Higgs boson decays is conducted in the four-lepton final state. The decay is assumed to proceed via a pair of beyond the standard model particles, or one such particle and a Z boson. The search uses proton-proton collision data collected with the CMS detector at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1), at a center-of-mass energy root s = 13 TeV. No significant deviation from the standard model expectation is observed. Upper limits at 95% confidence level are set on model-independent Higgs boson decay branching fractions. Additionally, limits on dark photon and axion-like particle production, based on two specific models, are reported.eninfo:eu-repo/semantics/openAccessArticle82410.1140/epjc/s10052-022-10127-0354673012-s2.0-85128259506Q1WOS:000780957800008Q2