SSB of scale symmetry, fermion families and quintessence without the long-range force problem

Details SSB of scale symmetry, fermion families and quintessence without the long-range force problem SSB of scale symmetry, fermion families and quintessence without the long-range force problem

2001-10-04

arxiv.org/abs/hep-th/0110040v3

Int.J.Mod.Phys. A17 (2002) 417

Physics

High Energy Physics

High Energy Physics - Theory

latex, 25 pages; misprint corrected

Scientific paper

10.1142/S0217751X02005736

We study a scale invariant two measures theory where a dilaton field \phi has no explicit potentials. The scale transformations include a shift \phi\to\phi+const. The theory demonstrates a new mechanism for gene- ration of the exponential potential: in the conformal Einstein frame (CEF), after SSB of scale invariance, the theory develops the exponential potential and, in general, non-linear kinetic term is generated as well. The possibility of quintessence solutions are shown. As an example, for one choice of the parameters we obtain standard scaling solutions usually used in the context of the quintessential scenario. For other choice of the parameters, the theory allows a scaling solution with equation of state p_{\phi}=w\rho_{\phi} where w is restricted by -1

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