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arXiv · 1910.10519

Nonminimal Inflation in Supersymmetric GUTs with $U(1)_R \times Z_n$ Symmetry

Muhammad Atif Masoud·Mansoor Ur Rehman·Mian Muhammad Azeem Abid
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Abstract

A supersymmetric hybrid inflation framework is employed to realize a class of non-minimal inflation models with $U(1)_R \times Z_n$ global symmetry. This framework naturally incorporates models based on grand unified theories by avoiding the most commonly faced monopole problem. The predictions of inflationary observables, the scalar spectral index $n_s = 0.960-0.966$ and the tensor to scalar ratio $r=0.0031-0.0045$, are in perfect agreement with the Planck 2018 data. For sub-Planckian values of the field the $Z_n$ symmetry is only allowed for $n\leq 4$.

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Muhammad Atif Masoud, Mansoor Ur Rehman, Mian Muhammad Azeem Abid. 2019-10-23. Nonminimal Inflation in Supersymmetric GUTs with $U(1)_R \times Z_n$ Symmetry. https://doi.org/10.1142/s0218271820400155

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