The Relic Problem of String Gas Cosmology
arXiv:0907.2443 · doi:10.1103/PhysRevD.80.063518
Abstract
We discuss the relic problem of string gas cosmology (SGC) using gravitinos and magnetic monopoles as examples. Since SGC operates near or at the Hagedorn temperature, relics are produced copiously; in the absence of dilution, their abundances are too large. A subsequent phase of reheating can solve the gravitino problem, but fails to dilute monopoles sufficiently. We propose a subsequent phase of inflation as the most natural solution to the monopole problem; unfortunately, inflation marginalizes almost all potential achievements of SGC, with the exception of a possible explanation of the dichotomy of space (why did only three dimensions inflate?).
5 pages, V2 and V3: added references
References in corpus (16)
- Big-Bang Nucleosynthesis and Gravitino
- Non-thermal Dark Matter and the Moduli Problem in String Frameworks
- Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
- String Gas Cosmology and Structure Formation
- Non-perturbative Gravity, Hagedorn Bounce & CMB
- Inflation and Brane Gases
- More on the Spectrum of Perturbations in String Gas Cosmology
- Dilaton Dynamics from Production of Tensionless Membranes
- On the new string theory inspired mechanism of generation of cosmological perturbations
- Dark energy and decompactification in string gas cosmology
- Cosmological Moduli Dynamics
- On the Transfer of Metric Fluctuations when Extra Dimensions Bounce or Stabilize
- Geometric Precipices in String Cosmology
- Fitting oscillating string gas cosmology to supernova data
- Inflation and The Minimal Supersymmetric Standard Model
- Predictions of Dynamically Emerging Brane Inflation Models