Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-09-25
Nucl.Phys. B597 (2001) 539-560; Erratum-ibid. B602 (2001) 644
Physics
High Energy Physics
High Energy Physics - Theory
24 pages, LaTeX, 2 figures (eps-files). To be published in Nuclear Physics B
Scientific paper
10.1016/S0550-3213(00)00739-2
In the very early Universe matter can be described as a conformal invariant ultra-relativistic perfect fluid, which does not contribute, on classical level, to the evolution of the isotropic and homogeneous metric. However, in this situation the vacuum effects of quantum matter fields become important. The vacuum effective action depends, essentially, on the particle content of the underlying gauge model. If we suppose that there is some desert in the particle spectrum, just below the Planck mass, then the effect of conformal trace anomaly is dominating at the corresponding energies. With some additional constraints on the gauge model (which favor extended or supersymmetric versions of the Standard Model rather than the minimal one), one arrives at the stable inflation. In this article we report about the calculation of the gravitational waves in this model. The result for the perturbation spectrum is close to the one for the conventional inflaton model, and is in agreement with the existing Cobe data.
Fabris Julio Cesar
Pelinson Ana M.
Shapiro Ilya L.
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