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, ${\mathit{m}}_{\mathit{H}}$≃80–150 GeV, via H→γγ 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 ${\mathit{m}}_{\mathit{H}}$≃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.