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Longitudinal Polarization at future $e^+e^-$ Colliders and Virtual New Physics Effects

F. M. Renard·C. Verzegnassi
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Abstract

The theoretical merits of longitudinal polarization asymmetries of electron-positron annihilation into two final fermions at future colliders are examined, using a recently proposed theoretical description. A number of interesting features, valid for searches of virtual effects of new physics, is underlined, that is reminiscent of analogous properties valid on top of $Z$ resonance. As an application to a concrete example, we consider the case of a model with triple anomalous gauge couplings and show that the additional information provided by these asymmetries would lead to a drastic reduction of the allowed domain of the relevant parameters.

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F. M. Renard, C. Verzegnassi. 1996-10-01. Longitudinal Polarization at future $e^+e^-$ Colliders and Virtual New Physics Effects. https://doi.org/10.1103/physrevd.55.4370

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