ATLAS Searches for Higgs Bosons Beyond the Standard Model

The search for the neutral and charged Higgs boson(s) beyond the Standard Model is presented, based on the ATLAS data collected in 2010 and 2011. A wide region of the MSSM parameter space is excluded via searches for Higgs boson decays into two tau-leptons, with an additional sensitivity improvement from the di-muon decay channel. The di-muon final state is additionally explored in the region of invariant masses below 12 GeV, motivated by the search for the light CP-odd Higgs boson predicted by the Next-to-Minimal Supersymmetric Models. The experimental observation of charged Higgs bosons would provide a clear signature of the physics beyond the Standard Model. Several final state topologies are explored, with Higgs bosons originating from the top-quark decays in top pair events and subsequently decaying into tau+nu or c bar{s}.