The ATLAS discovery potential for a heavy Charged Higgs boson in a large mass splitting MSSM scenario

We investigate the possibility for detecting a heavy charged Higgs boson in a large mass splitting MSSM scenario. In this until now unexplored part of parameter space the H+ -> WH decay channel is opened and in particular it yields a sizable branching ratio in the intermediate tanB region. This is of particular interest since the intermediate tanB region is uncovered in terms of charged Higgs discovery without turning to SUSY decay channels. However, despite a large branching ratio for H+ ->WH, the similarity of the signal distributions to those of the ttbar makes the detection prospects of the charged Higgs challenging in the channel.