CDM/baryon isocurvature perturbations in a sneutrino curvaton model
arXiv:1409.1669 · doi:10.1088/1475-7516/2014/10/068
Abstract
Matter isocurvature perturbations are strictly constrained from cosmic microwave background observations. We study a sneutrino curvaton model where both cold dark matter (CDM)/baryon isocurvature perturbations are generated. In our model, total matter isocurvature perturbations are reduced since the CDM/baryon isocurvature perturbations compensate for each other. We show that this model can not only avoid the stringent observational constraints but also suppress temperature anisotropies on large scales, which leads to improved agreement with observations.
20 pages, 4 figures
References in corpus (13)
- Big-Bang Nucleosynthesis and Gravitino
- Toward an Understanding of Foreground Emission in the BICEP2 Region
- Possible Signals of Wino LSP at the Large Hadron Collider
- Forecasted 21 cm constraints on compensated isocurvature perturbations
- Observational implications of mattergenesis during inflation
- Suppressing the impact of a high tensor-to-scalar ratio on the temperature anisotropies
- On quantifying and resolving the BICEP2/Planck tension over gravitational waves
- Sneutrino Chaotic Inflation and Landscape
- Compensation for large tensor modes with iso-curvature perturbations in CMB anisotropies
- Isocurvature perturbations and tensor mode in light of Planck and BICEP2
- Non-Gaussianity from Attractor Curvaton
- Pure Gravity Mediation and Chaotic Inflation in Supergravity
- High-Scale SUSY Breaking Models in light of the BICEP2 Result