Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2014/10/068
Keywords
particle physics - cosmology connection; supersymmetry and cosmology; leptogenesis; baryon asymmetry
Funding
- Ministry of Education, Science, Sports, and Culture (MEXT), Japan [25400248]
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- Program for the Leading Graduate Schools, MEXT, Japan
- JSPS
- Grants-in-Aid for Scientific Research [12J06240] Funding Source: KAKEN
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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.
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