The gravitino abundance in supersymmetric `new' inflation models

Abstract

We consider the abundance of gravitinos created from the vacuum fluctuation, in a class of `new' inflation models for which global supersymmetry is a good approximation. Immediately after inflation, gravitinos are produced, with number density determined by equations recently presented by Kallosh et. al. (hep-th/9907124) and Giudice et. al. (hep-ph/9907510). Unless reheating intervenes, creation may continue, maintaining about the same number density, until the Hubble parameter falls below the gravitino mass. In any case, the abundance of gravitinos created from the vacuum fluctuation exceeds the abundance from thermal collisions in a significant regime of parameter space, leading to tighter cosmological constraints.

9 pages latex. Same results but argument for late-time creation now appears in hep-ph/9912313

References in corpus (8)

• Gravitino Production After Inflation
• Thermal and Non-Thermal Production of Gravitinos in the Early Universe
• Non-Thermal Production of Dangerous Relics in the Early Universe
• Production of spin 3/2 particles from vacuum fluctuations
• Late-time creation of gravitinos from the vacuum
• The equivalence theorem and the production of gravitinos after inflation
• Gravitational production of gravitinos
• The abundance of moduli, modulini and gravitinos produced by the vacuum fluctuation

Cited by in corpus (7)

• Superconformal Symmetry, Supergravity and Cosmology
• Hybrid Inflation and Baryogenesis at the TeV Scale
• Quintessence From The Decay of a Superheavy Dark Matter
• Is nonperturbative inflatino production during preheating a real threat to cosmology?
• Fast Growth of Supermassive Black Holes in Galaxies
• Gravitino Thermal Production, Dark Matter, and Reheating of the Universe
• Constraints on Inflation Models from Supersymmetry Breakings