Variants of Kinetically Modified Non-Minimal Higgs Inflation in Supergravity

Abstract

We consider models of chaotic inflation driven by the real parts of a conjugate pair of Higgs superfields involved in the spontaneous breaking of a grand unification symmetry at a scale assuming its Supersymmetric value. Employing Kaehler potentials with a prominent shift-symmetric part proportional to c- and a tiny violation, proportional to c+, included in a logarithm we show that the inflationary observables provide an excellent match to the recent Planck and Bicep2/Keck Array results setting, e.g., 0.0064<= c+/c-<1/N where N=2 or 3 is the prefactor of the logarithm. Deviations of these prefactors from their integer values above are also explored and a region where hilltop inflation occurs is localized. Moreover, we analyze two distinct possible stabilization mechanisms for the non-inflaton accompanying superfield, one tied to higher order terms and one with just quadratic terms within the argument of a logarithm with positive prefactor Ns<6. In all cases, inflation can be attained for subplanckian inflaton values with the corresponding effective theories retaining the perturbative unitarity up to the Planck scale.

Final version

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Cited by in corpus (7)

• Starobinsky Inflation: From Non-SUSY To SUGRA Realizations
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• Unitarity-Safe Models of Non-Minimal Inflation in Supergravity
• SU(2,1) / (SU(2) x U(1)) B-L Higgs Inflation
• The Higgs boson decay into ZZ decaying to identical fermion pairs
• Induced-Gravity Palatini-Like Higgs Inflation in Supergravity Confronts ACT DR6
• Starobinsky Inflation with T-Model Kaehler Geometries