We study a new reheating approach in the framework of standard and braneworld inflation. Using the technique developed in Ref. 1, we consider a small field arctangent potential and show that this approach can be similarly applied within Randall–Sundrum type 2 scenario and provide additional constraints to reheating temperature [Formula: see text] and duration of reheating [Formula: see text]. We found that in brane case the effective equation-of-state parameter [Formula: see text] must be close to 1, to satisfy Planck-2018 joint constraints on [Formula: see text].
We consider a supersymmetric hybrid inflation in the framework of the RandallSundrum type-2 braneworld model. In particular, we study braneworld inflation in global supersymmetry with F-term and D-term. We show that we can solve partially the fine-tuning problem related to scalar fields coupling constants. We also derive all known spectrum inflationary parameters which are widely consistent with WMAP7, BAO and H 0 data, whereas the scalar spectral index n s > 0.98 which lies outside of the range allowed by observations.
In this paper we study the Chaplygin gas model as a candidate for inflation in the framework of the Randall Sundrum type-II braneworld model. We consider the original and generalized Chaplygin gas model in the presence of monomial potential. The inflationary spectrum perturbation parameters are reformulated and evaluated in the high-energy limit and we found that they depend on several parameters. We also showed that these perturbation parameters are widely compatible with the recent Planck data for a particular choice of the parameters space of the model. A suitable observational central value of n s ≃ 0.965 is also obtained in the case of original and generalized Chaplygin gas.
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