Associated production of Higgs bosons withtt¯pairs

Associated production of Higgs bosons with top-antitop pairs at hadron colliders, pp{→}Htt{}X, is examined. By tagging on an isolated secondary lepton, e or {μ}, from the t or t{} decay, discovery of an intermediate-mass Higgs boson, mH{}80--150 GeV, via H{→}{γ}{γ} is rendered feasible at the Superconducting Super Collider (SSC) ({}s =40 TeV). Allowing a factor-of-0.4 signal reduction for isolation cuts and selection efficiencies leaves about 21 events per SSC year for mH{}80--130 GeV, and somewhat less for 130--150 GeV, above an anticipated small background. At the CERN Large Hadron Collider ({}s =16 TeV), the cross section is reduced by about a factor of 1/8.