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arXiv · 2309.06953

New Inflation in Waterfall Region

Niamat Ullah Khan·Nadir Ijaz·Mansoor Ur Rehman
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Abstract

We introduce a class of new inflation models within the waterfall region of a generalized hybrid inflation framework. The initial conditions are generated in the valley of hybrid preinflation. Both single-field and multi-field inflationary scenarios have been identified within this context. A supersymmetric realization of this scenario can successfully be achieved within the tribrid inflation framework. To assess the model's viability, we calculate the predictions of inflationary observables using the $\delta N$ formalism, demonstrating excellent agreement with the most recent Planck data. Furthermore, this model facilitates successful reheating and nonthermal leptogenesis, with the matter-field component of the inflaton identified as a sneutrino.

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Niamat Ullah Khan, Nadir Ijaz, Mansoor Ur Rehman. 2023-09-13. New Inflation in Waterfall Region. https://doi.org/10.1103/physrevd.108.123545

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