SUSY Contributions to Rb and Top Quark Decay
Manuel Drees, R. M. Godbole, Monoranjan Guchait, Sreerup Raychaudhuri, D. P. Roy
Abstract
Stop contributions to radiative corrections to Rb and the top quark decay are analysed over the relevant MSSM parameter space. One sees a 30 % increase in the former along with a similar drop in the latter in going from the higgsino dominated to the mixed region. Consequently one can get a viable SUSY contribution to Rb within the constraint of the top quark data only in the mixed region, corresponding to a photino dominated LSP. We discuss the phenomenological implications of this model for top quark decay and direct stop production, which can be tested with the Tevatron data.
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