Abstract
We emphasize the importance of effects from heavy fields on supergravity models of inflation. We study, in particular, the backreaction of stabilizer fields and geometric moduli in the presence of supersymmetry breaking. Many effects do not decouple even if those fields are much heavier than the inflaton field. We apply our results to successful models of Starobinsky-like inflation and natural inflation. In most scenarios producing a plateau potential it proves difficult to retain the flatness of the potential after backreactions are taken into account. Some of them are incompatible with non-perturbative moduli stabilization. In natural inflation there exist a number of models which are not constrained by backreactions at all. In those cases the correction terms from heavy fields have the same inflaton-dependence as the uncorrected potential, so that inflation may be possible even for very large gravitino masses.
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Dudas, E., Wieck, C. Moduli backreaction and supersymmetry breaking in string-inspired inflation models. J. High Energ. Phys. 2015, 62 (2015). https://doi.org/10.1007/JHEP10(2015)062
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DOI: https://doi.org/10.1007/JHEP10(2015)062