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Testing Supersymmetric Grand Unified Models of Inflation

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arxiv hep-ph/0305089 v2 pith:5A52N57I submitted 2003-05-08 hep-ph astro-ph

V. N. Senoguz , Q. Shafi This is my paper
classification hep-phastro-ph
keywords modelsbreakingdiscussedinflationscalarscalesuperpotentialsupersymmetric
verification ladder T0 review T1 audit T2 compute T3 formal
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We reconsider a class of well motivated supersymmetric models in which inflation is associated with the breaking of a gauge symmetry G to H, with the symmetry breaking scale M~10^16 GeV. Starting with a renormalizable superpotential, we include both radiative and supergravity corrections to derive the inflationary potential. The scalar spectral index n_s can exceed unity in some cases, and it cannot be smaller than 0.98 if the number of e-foldings corresponding to the present horizon scale is around 60. Two distinct variations of this scenario are discussed in which non-renormalizable terms allowed by the symmetries are included in the superpotential, and one finds n_s>=0.97. The models discussed feature a tensor to scalar ratio r<~10^-4, while dn_s/dlnk<~10^-3. If G corresponds to SO(10) or one of its rank five subgroups, the observed baryon asymmetry is naturally explained via leptogenesis.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. GUT-Scale Smooth Hybrid Inflation with a Stabilized Modulus in Light of ACT and SPT Data

    hep-ph 2025-10 conditional novelty 6.0 of 10

    A smooth hybrid inflation model, augmented with a stabilized modulus, reproduces the spectral index measured by ACT and SPT while keeping Higgs v.e.v.s at the GUT scale.

  2. Supersymmetric Hybrid Inflation with K\"{a}hler-Induced $\mathbf{R}$-Symmetry Breaking

    hep-ph 2025-06 conditional novelty 5.0 of 10

    Nonrenormalizable R-symmetry breaking in the Kahler potential can tune the spectral index of supersymmetric hybrid inflation into the ACT DR6 window while keeping tensor modes below 1e-5.

  3. Shifted Hybrid Realization of Non-Minimal Higgs Inflation in Light of ACT DR6 and Planck Data

    hep-ph 2026-07 conditional novelty 4.0 of 10

    A shifted-hybrid non-minimal Higgs inflation model deforms the Starobinsky attractor via a leading non-renormalizable superpotential operator to raise ns into the ACT-preferred range while keeping r ~ 10^{-3}-10^{-2}.

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