Yukawa Corrections to Single Top Quark Production at the Fermilab Tevatron in the Two-Higgs-Doublet Models

Abstract

We calculate Yukawa corrections of order ${\alpha }_{ew}{M}_t^2/M_W^2$ to single top quark production via $q{\bar{q}}^{\prime }\to t\bar{b}$ at the Fermilab Tevatron in the two-Higgs-doublet models. In our calculation we also keep the terms proportional to $M_b^2{\tan }^2\beta$ since their effects may become rather important for large $\tan \beta$. The corrections can amount to more than a 15\% reduction in the production cross section relative to the tree level result in the general two-Higgs-doublet model, and a 10\% enhancement in the minimal supersymmetric model, which might be observable at a high-luminosity Tevatron.

13 pages, 4 figures, submitted to Phys.Rev.D