Light Higgs Searches at the CMS Detector

We will describe the search for exotic decays of Higgs boson to a pair of light pseudoscalar Higgs bosons under the hypothesis that one of the pseudoscalars decays to a pair of b quarks and the other decays to two photons. Such signatures are predicted in Beyond Standard Model (BSM) physics, namely next-to-minimal supersymmetric standard model. The final state consisting a pair of b jets and photons is analyzed producing the Higgs boson in asscoation with gauge bosons VH (V = W/Z). This analysis is based on a dataset of proton-proton collisions corresponding to luminosity 137 fb \(^{-1}\) accumulated with the CMS experiment at the CERN LHC in full Run-II at a center-of-mass energy of 13 TeV. The detailed estimation of background will be also presented.