Electroweak radiative corrections tott¯→H0H0in the two-Higgs-doublet model

Abstract

Electroweak radiative one-loop corrections to Higgs boson pair production in tt\ifmmode\bar\else\textasciimacron\fi{} fusion processes are calculated in the two-Higgs-doublet extension of the standard model. The numerical size of the nonstandard corrections is discussed for the process tt\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\rightarrow}${\mathit{H}}_{0}$${\mathit{H}}_{0}$. The relative difference between the predictions of the two-Higgs-doublet model and the minimal standard model for a light scalar ${\mathit{M}}_{{\mathit{H}}_{1}}$ and heavy ${\mathit{M}}_{{\mathit{H}}_{2}}$ and ${\mathit{M}}_{\mathrm{\ensuremath{\Phi}}}$ easily exceeds -10% in the forward and backward directions. In particular the angular-dependence corrections owing to the nonstandard Higgs bosons get larger where the box and cubic Higgs boson vertex corrections constitute the dominant part of the radiative corrections. \textcopyright{} 1996 The American Physical Society.