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Description
This poster presents results from a search for exotic decays of the 125 GeV Higgs boson (H) to a pair of light pseudoscalars a, where one pseudoscalar decays to two b quarks and the other to a pair of muons or tau leptons (H ->aa->2b2mu/2b2tau). The analysis is performed on the full CMS Run-2 dataset of proton-proton collisions at center-of-mass-energy 13 TeV, corresponding to an integrated luminosity of 138 fb^-1. Upper limits are set at 95% confidence level (CL) on the branching fraction of the Higgs boson to aa, to 2b2mu and to 2b2tau. In models with two Higgs doublets extended by a complex scalar singlet (2HDM+S), the results from the two final states are combined to determine model-independent upper limits on the branching fraction B(H -> aa -> llbb) at 95% CL, where l is a muon or tau lepton. Upper bounds on the combined branching fraction B(H->aa) are also set for different types of 2HDM+S.
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