Rising Bosonic Electroweak Virtual Effects at High Energy e+e- Colliders

Abstract

The virtual massive gauge boson effects on several observables in the process of charged fermion pairs production at $e^{+}{e}^{-}$ colliders are computed up to the TeV energy range in the Standard Model, working in the ``$Z$-peak subtracted'' representation. It is shown that these effects increase regularly with energy, approaching the typical ten percent relative size. A careful numerical evaluation is proposed, where the conditions dictated by gauge invariance are consistently implemented.

Comments: REVTeX, 21 pages, 11 figures. Minor changes, misprints corrected, conclusions unchanged. To appear in Phys. Rev. D