Neutralino dark matter is viable in four scenarios within a 5D gauge mediation model with an O(100) TeV gravitino, and the allowed parameter regions are mapped against current experiments.
Relaxing the Cosmological Moduli Problem
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abstract
Typically the moduli fields acquire mass m =C H in the early universe, which shifts the position of the minimum of their effective potential and leads to an excessively large energy density of the oscillating moduli fields at the later stages of the evolution of the universe. This constitutes the cosmological moduli problem, or Polonyi field problem. We show that the cosmological moduli problem can be solved or at least significantly relaxed in the theories in which C >> 1, as well as in some models with C << 1.
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Neutralino dark matter in gauge mediation
Neutralino dark matter is viable in four scenarios within a 5D gauge mediation model with an O(100) TeV gravitino, and the allowed parameter regions are mapped against current experiments.