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arXiv · 1611.10196

Non-Minimal Quartic Inflation in Supersymmetric SO(10)

George K. Leontaris·Nobuchika Okada·Qaisar Shafi
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Abstract

We describe how quartic ($λϕ^4$) inflation with non-minimal coupling to gravity is realized in realistic supersymmetric $SO(10)$ models. In a well-motivated example the $16-\overline{16}$ Higgs multiplets, which break $SO(10)$ to $SU(5)$ and yield masses for the right-handed neutrinos, provide the inflaton field $ϕ$. Thus, leptogenesis is a natural outcome in this class of $SO(10)$ models. Moreover, the adjoint (45-plet) Higgs also acquires a GUT scale value during inflation so that the monopole problem is evaded. The scalar spectral index $n_s$ is in good agreement with the observations and $r$, the tensor to scalar ratio, is predicted for realistic values of GUT parameters to be of order $10^{-3}-10^{-2}$.

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George K. Leontaris, Nobuchika Okada, Qaisar Shafi. 2016-11-30. Non-Minimal Quartic Inflation in Supersymmetric SO(10). https://doi.org/10.1016/j.physletb.2016.12.038

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