Open AccessScale-invariance, dynamically induced Planck scale and inflation in the Palatini formulation
Author(s) -
Ioannis D. Gialamas,
Αλέξανδρος Καράμ,
Thomas D. Pappas,
Antonio Racioppi,
Vassilis C. Spanos
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2105/1/012005
Subject(s) - inflation (cosmology) , physics , scalar curvature , planck , scale invariance , mathematical physics , scale (ratio) , scalar (mathematics) , quadratic equation , theoretical physics , einstein , curvature , scalar field , invariant (physics) , mathematics , quantum mechanics , geometry
We present two scale invariant models of inflation in which the addition of quadratic in curvature terms in the usual Einstein-Hilbert action, in the context of Palatini formulation of gravity, manages to reduce the value of the tensor-to-scalar ratio. In both models the Planck scale is dynamically generated via the vacuum expectation value of the scalar fields.