Direct search for exotic Higgs boson decays to two spin-zero particles in the H $\rightarrow$ 2a $\rightarrow$ 4b channel in pp collisions at $\sqrt$s = 13 TeV with the ATLAS detector

We present a search for a Higgs boson decaying to two spin-zero particles decaying to a pair of b-quarks H $\rightarrow$ 2a $\rightarrow$ 4b. The dataset used in the analysis corresponds to an integrated luminosity of 3.3 fb-1, collected by the ATLAS detector during 2015. The major background comes from top pair production. Various kinematic variables are combined into a multivariate discriminant to distinguish signal from background. The search is performed for the first time in ATLAS.