R_b Problem: Loop Contributions and Supersymmetry
classification
✦ hep-ph
keywords
contributionsexpressionsproblemablebamertbestburgesschoices
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I summarize a part of the work done with Bamert, Burgess, London and Nardi (hep-ph/9602438) in which we find simplified expressions for the possible one-loop contributions to the $R_b$ parameter from new virtual particles, including supersymmetric ones. Our expressions make it easier to identify which models and choices of parameters are best able to solve the $R_b$ problem.
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