Abstract
A supersymmetric hybrid inflation framework is employed to realize a class of nonminimal inflation models with [Formula: see text] 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 [Formula: see text]–0.966 and the tensor to scalar ratio [Formula: see text]–0.0045, are in perfect agreement with the Planck 2018 data. For sub-Planckian values of the field the [Formula: see text] symmetry is only allowed for [Formula: see text].
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