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13 papers · 2 filters
Dark Matter Gravitinos and Baryons via Q-ball decay in the Gauge-Mediated MSSM
Francesca Doddato, John McDonald
We show that late Q-ball decay in the MSSM with gauge-mediated SUSY breaking can provide a natural source of non-thermal NLSPs which subsequently decay to gravitino dark matter wit…
Baryon-to-Dark Matter Ratio from Random Angular Fields
John McDonald
We consider the baryon-to-dark matter ratio in models where the dark matter and baryon densities depend on angular fields θ_{d} and θ_{b} according to ρ_{d} ~ θ_{d}^α and ρ_{b} ~ θ…
Primordial Black Holes from the inflating curvaton
Kazunori Kohri, Chia-Min Lin, Tomohiro Matsuda
The primordial black hole (PBH) formation is studied in light of the inflating curvaton. The typical scale of the PBH formation is determined by curvaton inflation, which may gener…
Multiple dark matter scenarios from ubiquitous stringy throats
Diego Chialva, P. S. Bhupal Dev, Anupam Mazumdar
We discuss the possibility of having multiple Kaluza-Klein (KK) dark matter candidates which arise naturally in generic Type-IIB string theory compactification scenarios. These dar…
Non-Gaussianity in the inflating curvaton
Seishi Enomoto, Kazunori Kohri, Tomohiro Matsuda
Inflating curvaton can create curvature perturbation when the curvaton density is slowly varying. Using the delta-N formalism, we discuss the evolution of the curvature perturbatio…
Anthropically Selected Baryon Number and Isocurvature Constraints
John McDonald
The similarity of the observed baryon and dark matter densities suggests that they are physically related, either via a particle physics mechanism or anthropic selection. A pre-req…