• Braneworld Inflation in Supergravity with a Shift Symmetric K$\"{a}$hler Potential

• # Fulltext

Permanent link:
https://www.ias.ac.in/article/fulltext/joaa/037/02/0000013

• # Keywords

Shift symmetry; K\"{a}hler potential; braneworld; perturbation spectrum; Planck 2015.

• # Abstract

We propose a new solution to the $\eta$-problem in supergravity using a shift symmetric K\"{a}hler potential in the context of the Randall–Sundrum type II model. We focus on a F-term supergravity inflation with a minimal K\"{a}hler potential taking into account the radiative corrections. The slow-roll conditions are ensured by the shift symmetry where a very small value of $\eta$ $(\eta \ll 1)$ is obtained. In this context, we derive all known spectrum inflationary parameters which are widely consistent with Planck 2015 data for a particular choice of brane tension and coupling constant values. A suitable observational central value of $n_{s}=0.96$ is also obtained in the case of minimal K$\"{a}$hler potential.

• # Author Affiliations

A. Safsafi1 2 3

1. Laboratoire de Physique de la Matière Condensée, Equipe Physique Quantique et Application, Faculté des Sciences Ben M’sik, B.P. 7955, Université Hassan II, Casablanca, Morocco.
2. Equipe de Recherche Subatomique et Application, Faculté des Sciences Ben M’sik, Université Hassan II, Casablanca, Morocco.
3. Centre de Physique Mathématique (CPM), Focal Point Lab UFR-PHE, Rabat, Morocco.

• # Journal of Astrophysics and Astronomy

Volume 41, 2020
All articles
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