Revisiting Witten-O'Raifeartaigh Inflation for a Non-minimally Coupled Scalar Field
arXiv:2204.13694 · doi:10.1088/1475-7516/2022/08/002
Abstract
In this work, we revisit the Witten-O'Raifeartaigh model of inflation, in which the potential takes a form, when the scalar field is non-minimally coupled to gravity. We investigate the impact of the coupling in the prediction of the inflationary parameters, thereby affecting the viability of the model. We find that a small coupling of order is preferred by data at the plane level, and that the presence of a non-zero allows for a large interval of the mass scale , in which it is possible to achieve a low tensor-to-scalar ratio. We also establish constraints imposed by a subsequent reheating era, in which its duration and temperature can be related to CMB observables, which in return, restricts the possible values for the and parameters.
arXiv comment15 pages, 5 figures
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