Prospects for supersymmetric charged Higgs boson discovery at the Fermilab Tevatron and the CERN Large Hadron Collider -: art. no. 031701

We investigate the prospects for heavy charged Higgs boson production through the mechanisms p(p) over bar (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 beta. A detailed study is performed for all important production modes and basic background processes for the t(t) over bar b(b) over bar 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 5sigma or else be excluded up to a mass of similar to 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 LHC.