Full one-loop supersymmetric electroweak corrections tott¯h0associated production ine+e−annihilation

Abstract

We present a precise calculation of the lightest neutral Higgs boson production associated with top-quark pair at a linear collider. The full one-loop electroweak $\mathcal{O}({\ensuremath{\alpha}}_{ew})$ contributions to the process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}t\overline{t}{h}^{0}$ within the minimal supersymmetric standard model (MSSM) are included. We analyze the dependence of the electroweak corrections on the MSSM parameters such as ${M}_{{A}^{0}}$, $\mathrm{tan}\ensuremath{\beta}$, ${M}_{2}$ ${A}_{f}$, ${M}_{SUSY}$ and $\ensuremath{\mu}$. The results show that the full one-loop electroweak radiative corrections turn out to be about $\ensuremath{-}20%$ quantitatively and thus are important for future ${e}^{+}{e}^{\ensuremath{-}}$ linear colliders.