Prospects for supersymmetric charged Higgs boson discovery at the Fermilab Tevatron and the CERN Large Hadron Collider

We investigate the prospects for heavy charged Higgs boson production through the mechanisms pp? (pp)?H±tb+X at the upgraded Fermilab Tevatron and at the upcoming LHC at CERN, respectively. We focus on the minimal supersymmetric standard model case and include the leading quantum corrections at high tan?. A detailed study is performed for all important production modes and basic background processes for the tt? bb? signature. At the upgraded Tevatron a charged Higgs signal is potentially viable in the 220–250?GeV range or excluded at 95% C.L. up to 300?GeV. At the LHC, a H± of mass up to 800?GeV can be discovered at 5? or else be excluded up to a mass of ?1.5?TeV. The presence of SUSY quantum effects may highly influence the discovery potential in both machines and can typically shift these limits by 200?GeV at the LH