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We generalize the embedding of induced-gravity inflation beyond the no-scaleSupergravity presented in arXiv:1403.5486 employing two gauge singlet chiralsuperfields, a superpotential uniquely determined by applying a continuous Rand a discrete Zn symmetries, and a logarithmic Kahler potential including allthe allowed terms up to fourth order in powers of the various fields. We showthat, increasing slightly the prefactor (-3) encountered in the adopted Kahlerpotential, an efficient enhancement of the resulting tensor-to-scalar ratio canbe achieved rendering the predictions of the model consistent with the recentBICEP2 results, even with subplanckian excursions of the original inflatonfield. The remaining inflationary observables can become compatible with thedata by mildly tuning the coefficient involved in the fourth order term of theKahler potential which mixes the inflaton with the accompanying non-inflatonfield. The inflaton mass is predicted to be close to 10^14 GeV.

Reconciling Induced-Gravity Inflation in Supergravity With The Planck 2013 & BICEP2 Results