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- W2897681768 abstract "We consider a cosmological inflation scenario based on a no-scale supergravity sector with $U(1)_R$ symmetry. It is shown that a tree level $U(1)_R$ symmetric superpotential alone does not lead to a slowly rolling scalar potential. A deformation of this tree level superpotential by including an explicit $R$ symmetry breaking term beyond the renomalizable level is proposed. The resulting potential is found to be similar (but not exactly the same) to the one in Starobinsky inflation model. We emphasize that for successful inflation, with the scalar spectral index $n_s sim 0.96$ and the tensor-to-scalar ratio $r < 0.08$, a correlation between the mass parameters in the superpotential and the vacuum expectation value of the modulus field $T$ in the Kahler potential must be adopted." @default.
- W2897681768 created "2018-10-26" @default.
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- W2897681768 date "2019-05-20" @default.
- W2897681768 modified "2023-09-30" @default.
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- W2897681768 doi "https://doi.org/10.1103/physrevd.99.095022" @default.
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