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Systematic study of horizontal gauge theories |
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| Authors: | William A Ponce Luis A Wills Arnulfo Zepeda |
| Institution: | 1. Departamento de Física, Universidad de Antioquia, A.A. 1226, Medellín, Colombia 2. Departamento de Física, Centro de Investigación y de Estudios Avanzados del IPN, Apartado Postal 14-740, 07000, México, DF, Mexico 3. Departament de Física Teòrica, Universitat de València, E-46100, Burjassot, València, Spain |
| Abstract: | We analyze all the possible continuous horizontal gauge groups G H in relation with their possibility to explain m b ? m t. We assume that the only effective fermionic degrees of freedom correspond to the known fermions but allow the possibility of adding a right handed neutrino to each family. We assume that the Higgs fields which generate masses for these fermions, trough renormalizable Yukawa couplings, transform as an irreducible representation of SU(3)c ? SU(2)L ? U(1)Y ? GH. Under these assumptions we find two U(1)H or U(1) H1 ? U(1) H2 models free of anomalies and able to guarantee that only the top has a renormalizable mass-generating Yukawa coupling. |
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