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Jafar Sadeghi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address:
Phone: 9111125092

Research

Title
Logarithmic corrected F(R) gravity in the light of Planck 2015
Type
JournalPaper
Keywords
Modified gravity; Plank data; Einstein's frame
Year
2015
Journal Physics Letters B
DOI
Researchers Jafar Sadeghi ، Hoda Farahani

Abstract

In this Letter, we consider the theory of F(R) gravity with the Lagrangian density £=R+αR2+βR2ln⁡βR£=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.