Reducing the spectral index in supernatural inflation

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Reducing 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 کامل

Reducing the Spectral Index in F-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 index ns 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 ar...

متن کامل

Nonminimal Inflation and the Running Spectral Index

We study a class of models in which the inflaton is minimally coupled to gravity with a term f(R)φ. We focus in particular on the case when f ∼ R, the expansion of the scale factor is driven by the usual potential energy, while the rolling of the inflaton is driven by the nonminial coupling. We show that the power spectrum is in general blue, and the problem of getting a running spectral index ...

متن کامل

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 کامل

Inflation Models, Spectral Index and Observational Constraints

We have evaluated the observational constraints on the spectral index n, in the context of a ΛCDM model. For n scale-independent, as predicted by most models of inflation, present data require n ≃ 1.0 ± 0.1 at the 2-σ level. We have also studied the two-parameter scale-dependent spectral index, predicted by running-mass inflation models. Present data allow significant variation of n in this cas...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical Review D

سال: 2009

ISSN: 1550-7998,1550-2368

DOI: 10.1103/physrevd.79.083509