منابع مشابه
Supernatural Inflation: Inflation from Supersymmetry with No (Very) Small Parameters
Most models of inflation have small parameters, either to guarantee sufficient inflation or the correct magnitude of the density perturbations. In this paper we show that, in supersymmetric theories with weak scale supersymmetry breaking, one can construct viable inflationary models in which the requisite parameters appear naturally in the form of the ratio of mass scales that are already prese...
متن کاملReducing the Spectral Index in Supernatural Inflation
Supernatural inflation is an attractive model based just on a flat direction with soft SUSY breaking mass terms in the framework of supersymmetry. The beauty of the model is inferred from its name that the model needs no fine-tuning. However, the prediction of the spectral index is ns > ∼ 1, in contrast to experimental data. In this paper, we show that the beauty of supernatural inflation with ...
متن کاملD - Term Inflation
We show that inflation which is dominated by the D-term density avoids the 'slow-roll' problem of inflation in supergravity. Such an inflationary scenario can naturally emerge in theories with non-anomalous or anomalous U(1) gauge symmetry. In the latter case the scale of inflation is fixed by the Green–Schwarz mechanism of anomaly cancellation. The crucial point is that the (super)gravity-medi...
متن کاملDouble D-term inflation
Comparisons of cosmological models to current data show that the presence of a nontrivial feature in the primordial power spectrum of fluctuations, around the scale k ∼ 0.05hMpc−1, is an open and exciting possibility, testable in a near future. This could set new constraints on inflationary models. In particular, current data favour a ΛCDM model with a steplike spectrum, and more power on small...
متن کاملF-term Hybrid Inflation
We consider a class of well motivated supersymmetric models of F-term hybrid inflation (FHI) which can be linked to the supersymmetric grand unification. The predicted scalar spectral indexns cannot be smaller than 0.97 and can exceed unity including corrections from minimal supergravity, if the number of e-foldings corresponding to the pivot scale k∗ = 0.002/Mpc is around 50. These results are...
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ژورنال
عنوان ژورنال: Modern Physics Letters A
سال: 2010
ISSN: 0217-7323,1793-6632
DOI: 10.1142/s0217732310033207