Inverted Hybrid Inflation as a solution to gravitino problems in Gravity Mediation

Abstract

It was recently found that the decay of inflaton and the SUSY breaking field produces many gravitinos in the gravity mediation scenario. These discoveries led to an exclusion of many inflation models such as chaotic, (smooth) hybrid, topological and new inflation models. Under these circumstances we searched for a successful inflation model and found that the ``inverted'' hybrid inflation models can solve the gravitino overproduction problem by their distinctive shape of the potential. Furthermore, we found that this inflation model simultaneously can explain the observed baryon asymmetry through the non-thermal leptogenesis and is consistent with the WMAP results, that is, $n_s=0.951_{-0.019}^{+0.015}$ and the negligible tensor to scalar ratio.

23 pages, 2 figures inc

References in corpus (38)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Big-Bang Nucleosynthesis and Hadronic Decay of Long-Lived Massive Particles
• Large Scale Structure and Supersymmetric Inflation without Fine Tuning
• Leptogenesis as the origin of matter
• Model Independent Properties and Cosmological Implications of the Dilaton and Moduli Sectors of 4-d Strings
• Cosmological Implications of Dynamical Supersymmetry Breaking
• Natural Chaotic Inflation in Supergravity
• Hadronic Decay of Late-Decaying Particles and Big-Bang Nucleosynthesis
• Hybrid Inflation in Supergravity
• Dynamical Supersymmetry Breaking on Quantum Moduli Spaces
• Big-Bang Nucleosynthesis with Unstable Gravitino and Upper Bound on the Reheating Temperature
• Moduli-Induced Gravitino Problem
• Gravitino Production from Heavy Moduli Decay and Cosmological Moduli Problem Revived
• Leptogenesis in Inflationary Universe
• Chaotic Inflation and Baryogenesis in Supergravity
• Gravitino Overproduction in Inflaton Decay
• Smooth Hybrid Inflation
• Inflaton Decay in Supergravity
• The Gravitino-Overproduction Problem in Inflationary Universe
• Inflation models and observation
• Gravitinos from Heavy Scalar Decay
• Moduli/Inflaton Mixing with Supersymmetry Breaking Field
• Natural New Inflation in Broken Supergravity
• Anomaly-Induced Inflaton Decay and Gravitino-Overproduction Problem
• Inflaton Decay through Supergravity Effects
• New inflation, preinflation, and leptogenesis
• More varieties of hybrid inflation
• Mutated Hybrid Inflation
• Inflation models after WMAP year three
• The Polonyi Problem and Upper bound on Inflation Scale in Supergravity
• MSSM inflation
• The Decay of the Inflaton in No-scale Supergravity
• Supersymmetric topological inflation model
• A Note on Polonyi Problem
• Topological Inflation in Supergravity
• Retrofitted Gravity Mediation without the Gravitino-overproduction Problem
• R-invariant New Inflation Model vs Supersymmetric Standard Model