Curvature perturbation from supersymmetric flat directions

2008/06/30 by Antonio Riotto, Francesco Riva · 1 citation
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Curvature #Galaxies: Formation, Evolution, Phenomena #Geometry #Mathematical physics #Mathematics #Perturbation (astronomy) #Physics #Quantum electrodynamics #Quantum mechanics #Theoretical physics #astro-ph #hep-ph

paper · pdf · doi:10.1016/j.physletb.2008.10.058

published as Phys.Lett.B670:169-173,2008 · Corrected version for PLB

arxiv created 2008/11/06 · openalex publication_date 2008/11/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We show that a contribution to the total curvature perturbation may be due to the presence of flat directions in supersymmetric models. It is generated at the first oscillation of the flat direction condensate when the latter relaxes to the minimum of its potential after the end of inflation. We also point out that, if the contribution to the total curvature perturbation from supersymmetric flat direction is the dominant one, then a significant level of non-Gaussianity in the cosmological perturbation is also naturally expected.

Citations

• Supersymmetric Grandunification: An Update
• Generating the curvature perturbation without an inflaton
• Non-Gaussianity from Inflation: Theory and Observations
• The masses of weakly-coupled scalar fields in the early Universe
• Generating the Curvature Perturbation at the End of Inflation in String Theory
• Particle Physics Models of Inflation and the Cosmological Density Perturbation

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