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Date
December 20 (Wed) at 16:00 - 17:30, 2023 (JST)
Speaker
  • Payel Sarkar (Visiting Researcher, Kyoto University)
Language
English
Host
Che-Yu Chen

We use the PLANCK 2018 and the WMAP data to constraint inflation models driven by a scalar field ϕ in the presence of the non-minimal scalar-curvature mixing term 12ξRϕ2. We consider four distinct scalar field potentials ϕpeλϕ, (1ϕp)eλϕ, (1λϕ)p and αϕ21+αϕ2 to study inflation in the non-minimal gravity theory. We calculate the potential slow-roll parameters, predict the scalar spectral index ns, tensor-to-scalar ratio r, leading and higher order non-Gaussianity parameters (fNL, τNL and gNL) and the amplitude of the scalar spectrum As in the parameter (λ,p,α) space of the potentials corresponding to different values of the non-minimal coupling parameter ξ. We have compared our results with the ones existing in the literature, and this indicates the present status of non-minimal inflation after the release of the PLANCK 2018 data.

Reference

  1. Payel Sarkar, Ashmita, Prasanta Kumar Das, Inflationary Cosmology with a scalar-curvature mixing term 12ξRϕ2, Annals Phys. 454 (2023) 169340 (2023), doi: 10.1016/j.aop.2023.169340, arXiv: 2205.05532

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