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- W2036171412 abstract "We consider hybrid inflation for small couplings of the inflaton to matter such that the critical value of the inflaton field exceeds the Planck mass. It has recently been shown that inflation then continues at subcritical inflaton field values where quantum fluctuations generate an effective inflaton mass. The effective inflaton potential interpolates between a quadratic potential at small field values and a plateau at large field values. An analysis of the allowed parameter space leads to predictions for the scalar spectral index n_s and the tensor-to-scalar ratio r similar to those of natural inflation. Using the range for n_s and r favoured by the Planck data, we find that the energy scale of the plateau is constrained to the interval (1.6 - 2.4) * 10^16 GeV which includes the energy scale of gauge coupling unification in the supersymmetric standard model. The tensor-to-scalar ratio is predicted to have the lower bound r > 0.049 for 60 e-folds before the end of inflation." @default.
- W2036171412 created "2016-06-24" @default.
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- W2036171412 date "2015-04-07" @default.
- W2036171412 modified "2023-09-30" @default.
- W2036171412 title "Grand unification and subcritical hybrid inflation" @default.
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- W2036171412 doi "https://doi.org/10.1103/physrevd.91.081302" @default.
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