Logarithmic corrected F(R) gravity in the light of Planck 2015

Logarithmic corrected F(R) gravity in the light of Planck 2015

In this Letter, we consider the theory of F(R) gravity with the Lagrangian density £=R+αR2+βR2ln⁡βR. We obtain the constant curvature solutions and find the scalar potential of the gravitational field. We also obtain the mass squared of a scalaron in the Einstein's frame. We find cosmological p...

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Bibliographic Details
Main Authors: J. Sadeghi, H. Farahani
Format: Article
Language:English
Published: Elsevier 2015-12-01
Series:Physics Letters B
Subjects:
Modified gravity
Plank data
Einstein's frame
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269315007716
Description
Summary:In this Letter, we consider the theory of F(R) gravity with the Lagrangian density £=R+αR2+βR2ln⁡βR. We obtain the constant curvature solutions and find the scalar potential of the gravitational field. We also obtain the mass squared of a scalaron in the Einstein's frame. We find cosmological parameters corresponding to the recent Plank 2015 results. Finally, we analyze the critical points and stability of the new modified theory of gravity and find that logarithmic correction is necessary to have successful model.
ISSN:0370-2693
1873-2445

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