Scalar-tensor extension of Natural Inflation

11 Jun 2020 Simeon Guillem

We show that embedding Natural Inflation in a more general scalar-tensor theory, with non-minimal couplings to the Ricci scalar and the kinetic term, alleviates the current tension of Natural Inflation with observational data. The coupling functions respect the periodicity of the potential and the characteristic shift symmetry $\phi \rightarrow \phi + 2\pi f$ of the original Natural Inflation model, and vanish at the minimum of the potential... (read more)

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Categories


  • COSMOLOGY AND NONGALACTIC ASTROPHYSICS
  • GENERAL RELATIVITY AND QUANTUM COSMOLOGY
  • HIGH ENERGY PHYSICS - THEORY