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arXiv · 1412.1460

Flipped GUT Inflation

John Ellis·Tomas E. Gonzalo·Julia Harz·Wei-Chih Huang
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Abstract

We analyse the prospects for constructing hybrid models of inflation that provide a dynamical realisation of the apparent closeness between the supersymmetric GUT scale and the possible scale of cosmological inflation. In the first place, we consider models based on the flipped SU(5)$\times$U(1) gauge group, which has no magnetic monopoles. In one model, the inflaton is identified with a sneutrino field, and in the other model it is a gauge singlet. In both cases we find regions of the model parameter spaces that are compatible with the experimental magnitudes of the scalar perturbations, $A_s$, and the tilt in the scalar perturbation spectrum, $n_s$, as well as with an indicative upper limit on the tensor-to-scalar perturbation ratio, $r$. We also discuss embeddings of these models into SO(10), which is broken at a higher scale so that its monopoles are inflated away.

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John Ellis, Tomas E. Gonzalo, Julia Harz, Wei-Chih Huang. 2015-08-03. Flipped GUT Inflation. https://doi.org/10.1088/1475-7516%2F2015%2F03%2F039

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