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Gauge-invariant inflaton in the minimal supersymmetric standard model

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Article number191304
<mark>Journal publication date</mark>9/11/2006
<mark>Journal</mark>Physical review letters
Issue number19
Number of pages4
Publication StatusPublished
<mark>Original language</mark>English


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.

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© 2006 The American Physical Society 4 revtex pages, some references added, stabilization of moduli and supergravity effects are discussed