In this report we survey the low-energy phenomenological implications of superstring-
inspired E 6 models. The motivation for such models is reviewed. New particles including …

Extended electroweak models need new parameters (including new renormalization-
induced gauge-mixing angles) to fix the gauge currents. We present the renormalization …

We evaluate the Z′→ l+ l− cross section at present and future hadron colliders, for the
minimal (E 6) extended electroweak models inspired by superstrings (including …

Motivated by the plethora of models, mainly remanant from superstring theories, in which
several U (1) factors are present, we consider constraints on these theories from the …

A renormalization group analysis is performed for a class of superstring inspired models,
where the effects on the estimate of the low-energy parameters, sin2θ W, α and α3, at MW …

Some algebraic issues are discussed in treating the renormalization group evolution of
gauge couplings with several U (1) factors, where some stages of gauge symmetry …

Different scenarios for physics beyond the standard model of electro-weak and strong
interactions are considered. The first scenario is a supersymmetric unified framework …

The phenomenology of a three-generation superstring model arising from the
compactification of the ten-dimensional heterotic superstring theory on the Tian-Yau …

CERTIFICA: Que la present memoria, que porta per títol" NOVES INTERACCIONS
ELECTROFEBLES INSPIRADES PER SUPERCORDES", ha estat realitzada sota la seva …