Search for low-mass dilepton resonances in Higgs boson decays to four-lepton final states in proton-proton collisions at [Formula: see text]

在质子-质子碰撞中寻找希格斯玻色子衰变为四轻子末态的低质量双轻子共振态 [公式:见正文]

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Abstract

A 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 [Formula: see text] . 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.

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