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Narges Rashidi Talouki

Narges Rashidi Talouki

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

Research

Title
Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of Planck 2015 Data
Type
JournalPaper
Keywords
Cosmological Inflation
Year
2016
Journal Advances in High Energy Physics
DOI
Researchers Kourosh Nozari ، Narges Rashidi Talouki

Abstract

We study the dynamics of a generalized inflationary model in which both the scalar field and its derivatives are coupled with the gravity.We consider a general form of the nonminimal derivative coupling in order to have a complete treatment of the model. By expanding the action up to the second order in perturbation, we study the spectrum of the primordial modes of the perturbations. Also, by expanding the action up to the third order and considering the three-point correlation functions, the amplitude of the non-Gaussianity of the primordial perturbations is studied in both equilateral and orthogonal configurations. Finally, by adopting some sort of potentials, we compare the model in hand with the Planck 2015 released observational data and obtain some constraints on the model’s parameters space. As an important result, we show that the nonminimal couplings help to make models of chaotic inflation that would otherwise be in tension with Planck data, in better agreement with the data. This model is consistent with observation at weak coupling limit.