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

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

1996-09-30

arxiv.org/abs/hep-ph/9609520v2

Phys.Rev. D55 (1997) 4370-4379

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages and 1 figure. e-mail: renard@lpmsun2.lpm.univ-montp2.fr

Scientific paper

10.1103/PhysRevD.55.4370

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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