Title:	Non-thermal moduli production during preheating in -attractor inflation models
Authors:	Alam, Khursid Bastero-Gil, Mar Duttaa, Koushik Ragavendrac, H.V.
Keywords:	cosmology of theories beyond the SM inflation particle physics - cosmology connection physics of the early universe
Issue Date:	28-Nov-2023
Publisher:	IOP Publishing Lmt.
Citation:	Journal of Cosmology and Astroparticle Physics, 2023, Article No. 095
Abstract:	Production of gravitationally coupled light moduli fields must be suppressed in the early universe so that its decay products do not alter Big Bang Nucleosynthesis (BBN) predictions for light elements. On the other hand, the moduli quanta can be copiously produced non-thermally during preheating after the end of inflation. In this work, we study the production of moduli in the -attractor inflationary model through parametric resonances. For our case, where the inflationary potential at its minimum is quartic, the inflaton field self-resonates, and subsequently induces a large production of moduli particles. We find that this production is suppressed for small values of . Combining semi-analytical estimation and numerical lattice simulations, we infer the parametric dependence on and learn that needs to be . 10−8m2 Pl to be consistent with BBN for O(1) coupling between inflaton and moduli. This in turn predicts an upper bound on the energy scale of inflation and on the reheating temperature.
Description:	Restricted Access
URI:	http://hdl.handle.net/2289/8265
Alternative Location:	https://doi.org/10.1088/1475-7516/2023/11/095
Copyright:	2023, IOP Publishing Ltd.
Appears in Collections:	Research Papers (A&A)

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