Supersymmetric Electroweak Corrections to the Chargino Decay into Neutralino and W Boson

Abstract

We investigated the electroweak corrections from one-loop diagrams involving the third generation (s)quarks to the decay width of process ${\tilde{\chi }}_1^{+}\to W^{+}{\tilde{\chi }}_1^0$ in the framework of the Minimal Supersymmetric Standard Model. Our calculation shows that these corrections are not very sensitive to the mass of the lightest neutralino ${\tilde{\chi }}_1^0$ and the sbottom mixing angle ${\theta }_b$, but depend strongly on the top squark mixing angle ${\theta }_t$ and tan$\beta$. With our chosen parameters, we find that these radiative corrections can exceed 10%, therefore they should be taken into account for the precise experimental measurement at future colliders.

Comments: 20 pages, 7 eps figures (to be published in J. Phys. G)