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arXiv · 2211.10988

New one-parametric extension of the Starobinsky inflationary model

Ekaterina O. Pozdeeva·Sergey Yu. Vernov
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Abstract

We propose a one-parametric extension of the Starobinsky $R+R^2$ model by adding the $(R+m^2β^2)^{3/2}$ term. The parameter $m$ is the inflaton mass, which is determined in the same way as in the Starobinsky model, and $β$ is a dimensionless constant. Using the Einstein frame and the scalar field potential, we get the inflationary parameters of the model proposed. The value of the tensor-to-scalar ratio $r$ can be significantly larger than in the Starobinsky model. The considered inflationary model is in a good agreement with the current observational data. The corresponding scalar field potential is a polynomial of the exponential function.

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Ekaterina O. Pozdeeva, Sergey Yu. Vernov. 2023-03-27. New one-parametric extension of the Starobinsky inflationary model. https://doi.org/10.1088/1402-4896%2Facc6a5

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