2024 : 7 : 15
Narges Rashidi Talouki

Narges Rashidi Talouki

Academic rank: Assistant Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address: University of Mazandaran
Phone: 01135302401

Research

Title
Some aspects of nonminimal inflation driven by a superpotential
Type
JournalPaper
Keywords
Inflation; nonminimal coupling; cosmological perturbations; non-Gaussianity; superpotential; observational constraints
Year
2016
Journal INTERNATIONAL JOURNAL OF MODERN PHYSICS D
DOI
Researchers Kourosh Nozari ، Narges Rashidi Talouki

Abstract

We study a nonminimal inflation which is driven by a superpotential. By adopting the Arnowitt–Deser–Misner formalism, we explore the primordial perturbations and its non-Gaussianity in this framework. By expanding the action up to the second-order in perturbations, we seek the scalar spectral index, its running and the tensor-to-scalar ratio. In this regard, we find the ranges of the nonminimal coupling and superpotential parameters which lead to the observationally viable perturbations parameters. The non- Gaussian feature in both the equilateral and orthogonal configurations in this setup, is studied by exploring the third-order action. We show that in some ranges of the nonminimal and superpotential parameters, the model predicts large non-Gaussianity. By comparing the numerical results with Planck2015 data, we test the viability of the model and find some constraints on the model’s parameters space.