Back-door fine-tuning in supersymmetric low scale inflation

Abstract

Low scale inflation has many virtues and it has been claimed that its natural realisation in supersymmetric standard model can be achieved rather easily. In this letter we have demonstrated that also in this case the dynamics of the hidden sector responsible for supersymmetry breakdown and the structure of the soft terms affects significantly, and in fact often spoils, the would-be inflationary dynamics. Also, we point out that the issue if the cosmological constant cancellation in the post-inflationary vacuum strongly affects supersymmetric inflation. It is important to note the crucial difference between freezing of the modulus and actually stabilising it - the first approach misses parts of the scalar potential which turn out to be relevant for inflation. We argue, that it is more likely that the low scale supersymmetric inflation occurs at a critical point at the origin in the field space than at an inflection point away from the origin, as the necessary fine-tuning in the second case is typically larger.

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References in corpus (13)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Gauge invariant MSSM inflaton
• MSSM flat direction inflation: slow roll, stability, fine tunning and reheating
• Moduli stabilization and uplifting with dynamically generated F-terms
• Solving the Cosmological Moduli Problem with Weak Scale Inflation
• Locally stable non-supersymmetric Minkowski vacua in supergravity
• A-term inflation and the MSSM
• Low-scale inflation
• Natural Supergravity inflation
• Implementing quadratic supergravity inflation
• Moduli Stabilization in Meta-Stable Heterotic Supergravity Vacua
• The Price of WMAP Inflation in Supergravity
• Coupling Hybrid Inflation to Moduli

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• Inflection point inflation: WMAP constraints and a solution to the fine-tuning problem
• Geometrical destabilization, premature end of inflation and Bayesian model selection
• Kaehler Potentials for Hilltop F-term Hybrid Inflation
• Inflation with large supergravity corrections
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• Initial conditions for small-field inflation
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