Electroweak Corrections to the Deacy $H^{+}\to W^{+}h$ in the Minimal Supersymmetric Model

Abstract

We calculate the $O({\alpha }_{ew}{m}_{t(b)}^2/m_W^2)$ and $O({\alpha }_{ew}{m}_{t(b)}^4/m_W^4)$ supersymmetric electroweak corrections to the process $H^{+}\to W^{+}h$ in the Minimal Supersymmetric Model. These corrections arise from the virtual effects of the third family quaurks (top and bottom) and squarks (top-squark and bottom-squark). We find that for $m_{H^{+}}>200$GeV at low $\tan \beta (\le 3)$, the corrections can increase the tree-level decay widths and the branching radios more than 20% and 40%, respectively.

Comments: 20 pages, including 7 ps figures