Low energy strong electroweak sector with decoupling
- Dipartimento di Fisica, Universita di Firenze, Largo E. Fermi, 2, I-50125 Firenze (Italy)
- Departement de Physique Theorique, Universite de Geneve, 24 quai E.-Ansermet, CH-1211 Geneve 4 (Switzerland)
- INFN, Sezione di Firenze, Largo E. Fermi, 2, I-50125 Firenze (Italy)
- Dipartimento di Fisica, Universita di Parma, Viale delle Scienze, I-43100 Parma (Italy)
We discuss possible symmetries of effective theories describing spinless and spin-1 bosons, mainly to concentrate on an intriguing phenomenological possibility: that of a hardly noticeable strong electroweak sector at relatively low energies. Specifically, a model with both vector and axial vector strong interacting bosons may possess a discrete symmetry imposing degeneracy of the two sets of bosons (degenerate BESS model). In such a case its effects at low energies become almost invisible and the model easily passes all low energy precision tests. The reason lies essentially in the fact that the model automatically satisfies decoupling, contrary to models with only vectors. For large mass of the degenerate spin-one bosons the model becomes identical at the classical level to the standard model taken in the limit of infinite Higgs boson mass. For these reasons we have thought it worthwhile to fully develop the model, together with its possible generalizations, and to study the expected phenomenology. For instance, just because of its invisibility at low energy, it is conceivable that degenerate BESS has low mass spin-one states and gives quite visible signals at existing or forthcoming accelerators. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 284079
- Journal Information:
- Physical Review, D, Vol. 53, Issue 9; Other Information: PBD: May 1996
- Country of Publication:
- United States
- Language:
- English
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