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- W1850689955 abstract "In the lights of current BICEP2 observations accompanied with the PLANCK satellite results, it has been observed that the simple single field chaotic inflationary models provide a good agreement with their spectral index ns and large tensor-to-scalar ratio r (0.15<r<0.26). To explore the other simple models, we consider the fractional-chaotic inflationary potentials of the form V0ϕa/b where a and b are relatively prime. We show that such kind of inflaton potentials can be realized elegantly in the supergravity framework with generalized shift symmetry and a nature bound a/b<4 for consistency. Especially, for the number of e-folding from 50 to 60 and some a/b from 2 to 3, our predictions are nicely within at least 1σ region in the (r–ns) plane. We also present a systematic investigation of such chaotic inflationary models with fractional exponents to explore the possibilities for the enhancement in the magnitude of running of spectral index (αns) beyond the simplistic models." @default.
- W1850689955 created "2016-06-24" @default.
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- W1850689955 date "2014-11-01" @default.
- W1850689955 modified "2023-10-13" @default.
- W1850689955 title "Fractional-chaotic inflation in the lights of PLANCK and BICEP2" @default.
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- W1850689955 doi "https://doi.org/10.1016/j.physletb.2014.10.007" @default.
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