Leptogenesis in Smooth Hybrid Inflation

Cairo); G. Lazarides (Aristotle U. of Thessaloniki); R. Jeannerot (SISSA; S. Khalil (Sussex U. & Ain Shams U.; Trieste)

Leptogenesis in Smooth Hybrid Inflation

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arxiv hep-ph/0103229 v2 pith:LDSKN4SM submitted 2001-03-21 hep-ph

R. Jeannerot (SISSA , Trieste) , S. Khalil (Sussex U. & Ain Shams U. , Cairo) , G. Lazarides (Aristotle U. of Thessaloniki) This is my paper

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keywords inflationhybridleptogenesissmoothadequateatmosphericavoidsbaryogenesis

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We present a concrete supersymmetric grand unified model based on the Pati-Salam gauge group SU(4)_c x SU(2)_L x SU(2)_R and leading naturally to smooth hybrid inflation, which avoids the cosmological disaster encountered in the standard hybrid inflationary scenario from the overproduction of monopoles at the end of inflation. Successful `reheating' which satisfies the gravitino constraint takes place after the termination of inflation. Also, adequate baryogenesis via a primordial leptogenesis occurs consistently with the solar and atmospheric neutrino oscillation data as well as the SU(4)_c symmetry.

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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.

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