Information and Discrimination from b Quark Production on Z Resonance
D. Comelli, C. Verzegnassi, F. M. Renard
Abstract
We introduce and define operatively in a model independent way a new ``heavy" b-vertexparameter, ηb, that can be derived from the measurement of a special polarization asymmetry for production of b-quarks on Z resonance. We show that the combination of the measurement of ηb with that of a second and previously defined ``heavy" b-vertex parameter δbV can discriminate a number of models of New Physics that remain associated to different ``trajectories" in the plane of the variations of the two parameters. This is shown in particular for some popular SUSY and technicolor-type models. In general, this discrimination is possible if a measurement of both parameters is performed.
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