Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-05-03
Phys.Rev.Lett.97:191304,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 revtex pages, some references added, stabilization of moduli and supergravity effects are discussed
Scientific paper
10.1103/PhysRevLett.97.191304
We argue that all the necessary ingredients for successful inflation are present in the flat directions of the Minimally Supersymmetric Standard Model. We show that out of many gauge invariant combinations of squarks, sleptons and Higgses, there are two directions, ${\bf LLe}$, and ${\bf udd}$, which are promising candidates for the inflaton. The model predicts more than $10^3$ e-foldings with an inflationary scale of $H_{\rm inf}\sim {\cal O}(1-10)$ GeV, provides a tilted spectrum with an amplitude of $\delta_H\sim 10^{-5}$ and a negligible tensor perturbation. The temperature of the thermalized plasma could be as low as $T_{rh}\sim {\cal O}(1-10)$~TeV. Parts of the inflaton potential can be determined independently of cosmology by future particle physics experiments.
Allahverdi Rouzbeh
Enqvist Kari
Garcia-Bellido Juan
Mazumdar Anupam
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