Search for 2HDM neutral Higgs bosons through the $\mathrm{H} \to \mathrm{Z}\mathrm{A} \to \ell^{+}\ell^{-}\mathrm{b}\overline{\mathrm{b}}$ process in proton-proton collisions at $\sqrt{s} = 13~\mathrm{TeV}$

This note reports on a search for an extended scalar sector of the standard model, where a new CP-even (odd) scalar decays to a Z boson and a lighter CP-odd (even) scalar, which further decays to $\mathrm{b}\overline{\mathrm{b}}$. The Z boson is reconstructed via its decays to leptons. The analysed data were recorded in proton-proton collisions at $\sqrt{s} = 13~\mathrm{TeV}$, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of $35.9~\mathrm{fb}^{-1}$. Data and predictions from the standard model are in agreement within uncertainties. Upper limits at $95\%$ confidence level are set on the production cross section times branching ratio, with masses of the resonances ranging up to $1000~\mathrm{GeV}$. The results are interpreted in the context of the Two-Higgs Doublet Model.