The scalar mode of Weyl-invariant Einstein-Cartan quadratic gravity yields the same inflationary potential as pseudoscalaron inflation and can fit CMB data for large parameter q.
Inflation and Reheating through an Independent Affine Connection
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This paper is based on a talk in which I discussed how a component of the dynamical affine connection, that is independent of the metric, can drive inflation in agreement with observations. This provides a geometrical origin for the inflaton. I also illustrated how the decays of this field, which has spin 0 and odd parity, into Higgs bosons can reheat the universe to a sufficiently high temperature.
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Geometrical origin of inflation in Weyl-invariant Einstein-Cartan gravity
The scalar mode of Weyl-invariant Einstein-Cartan quadratic gravity yields the same inflationary potential as pseudoscalaron inflation and can fit CMB data for large parameter q.