We discuss the impact of the preheating stage due to the interaction of the inflaton to fermions in Palatini formulation. In Palatini inflation with large non-minimal coupling, the field is allowed to return to the plateau region during the reheating stage, therefore the average equation of state per oscillations is closer to -1 rather than 1\/3. The incursion in the plateau, however, leads to a highly efficient tachyonic instability, which is able to reheat the Universe in less than one e-fold. By taking prescription II into account, which is discussed in the literature, we calculate the spectral index n_s and the tensor-to-scalar ratio r in the wide range of κ- ξ. We will show the results which are compatible with the data given by the Keck Array/BICEP2 and Planck collaborations.
Non-minimal inflation Palatini gravity Preheating Radiative corrections
Birincil Dil | İngilizce |
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Konular | Klasik Fizik (Diğer) |
Bölüm | Natural Sciences |
Yazarlar | |
Yayımlanma Tarihi | 24 Eylül 2021 |
Gönderilme Tarihi | 7 Mart 2021 |
Kabul Tarihi | 20 Temmuz 2021 |
Yayımlandığı Sayı | Yıl 2021 |