The mechanism for generating radiative breaking of the gauge symmetry at an intermediate mass scale is analyzed in E6 superstring-inspired models. Such a breaking can be induced by large vacuum expectation values, which are developed along a flat direction of the scalar potential. Radiative one-loop corrections as well as possible contributions from non-renormalizable terms are taken into account. The minimization of the effective potential is carried out quantitatively in a specific model based on the gauge group SU(3)c×SU(2)L×[U(1)]3. A numerical analysis is performed in order to establish the compatibility between the values obtained for MI (in the range 107-1014 GeV) and those of the low-energy parameters (sin2θw, α3, and αem). The characteristic features of the example considered here are believed to remain valid in more general situations. © 1987.
Radiative generation of intermediate mass scale in superstring-inspired models
FERUGLIO, FERRUCCIO;ZWIRNER, FABIO
1987
Abstract
The mechanism for generating radiative breaking of the gauge symmetry at an intermediate mass scale is analyzed in E6 superstring-inspired models. Such a breaking can be induced by large vacuum expectation values, which are developed along a flat direction of the scalar potential. Radiative one-loop corrections as well as possible contributions from non-renormalizable terms are taken into account. The minimization of the effective potential is carried out quantitatively in a specific model based on the gauge group SU(3)c×SU(2)L×[U(1)]3. A numerical analysis is performed in order to establish the compatibility between the values obtained for MI (in the range 107-1014 GeV) and those of the low-energy parameters (sin2θw, α3, and αem). The characteristic features of the example considered here are believed to remain valid in more general situations. © 1987.Pubblicazioni consigliate
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