https://doi.org/10.1140/epjc/s10052-020-8025-4
Regular Article - Theoretical Physics
A simple 
deformation of Starobinsky inflationary model
1
Department of Physics, University of Athens, 15784, Zographou, Greece
2
Institute of Nuclear and Particle Physics, NCSR “Demokritos”, 15310, Agia Paraskevi, Greece
* e-mail: jimcanko@phys.uoa.gr
Received:
9
April
2019
Accepted:
7
May
2020
Published online:
21
May
2020
We study a model including a real scalar field 
non-minimally coupled to 
gravity, which is conformally equivalent to an Einstein–Hilbert theory, involving two real scalar fields. We consider three special cases of the potential of the field in the -frame: a vanishing potential, a mass term and a Higgs potential. All these lead to non-trivial two-field potentials in the Einstein-frame which in particular directions resemble the well-known Starobinsky model. We find, that all these cases can yield viable inflationary models in complete agreement with current observational data.
© The Author(s), 2020
