Search for exotic Higgs boson decays to pairs of light pseudoscalars with the CMS detector

Searches for exotic Higgs boson decays to pairs of light pseudoscalars are performed using the data collected by the CMS experiment at center-of-mass energies of 8 and 13 TeV. The results are interpreted in different scenarios of two Higgs doublet models extended by a scalar singlet. Particular emphasis is given to the recent $\textrm{h}\to \textrm{aa}\to 2\textrm{b}2\tau$ analysis, which is the first to target this decay chain at the LHC.