Non-thermal Dark Matter from Affleck-Dine Baryogenesis
Abstract
Description
In this talk we discuss the origin and nature of the dark matter in the Affleck-Dine (AD) baryogenesis. The AD baryogenesis via most of the flat directions predict formations of large Q-balls, and a great number of the lightest supersymmetric particles (LSPs) are produced nonthermally via the late-time decays of these Q-balls. In order to avoid the overclosure of the universe by these nonthermally produced LSPs, an LSP with a large pair-annihilation cross section, like Higgsino- or Wino-like neutralino, is required, instead of the standard Bino-like neutralino. This reveals new cosmologically interesting parameter regions in various SUSY breaking models, which have not attracted much attention so far.
Talk given at SUSY'02, DESY Hamburg, Germany, June 2002. 7 pages, 1 figure
Talk given at SUSY'02, DESY Hamburg, Germany, June 2002. 7 pages, 1 figure