Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-10-02
Phys.Rev. D53 (1996) 1784-1798
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revised version to appear in Phys Rev D. Improved discussion of the possible effect of parametric resonance. Latex, 31 pages
Scientific paper
10.1103/PhysRevD.53.1784
In supersymmetric theories a field can develop a vacuum expectation value $M \gg 10^3\,{\rm GeV}$, even though its mass $m$ is of order $10^2$ to $10^3\,{\rm GeV}$. The finite temperature in the early Universe can hold such a field at zero, corresponding to a false vacuum with energy density $ V_0 \sim m^2 M^2 $. When the temperature falls below $V_0^{1/4}$, the thermal energy density becomes negligible and an era of thermal inflation begins. It ends when the field rolls away from zero at a temperature of order $m$, corresponding to of order 10 $e$-folds of inflation which does not affect the density perturbation generated during ordinary inflation. Thermal inflation can solve the Polonyi/moduli problem if $M$ is within one or two orders of magnitude of $10^{12}\,{\rm GeV}$.
Lyth David H.
Stewart Ewan D.
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