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CDM/baryon isocurvature perturbations in a sneutrino curvaton model

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arxiv 1409.1669 v1 pith:HXPHWWSS submitted 2014-09-05 hep-ph astro-ph.CO

CDM/baryon isocurvature perturbations in a sneutrino curvaton model

Keisuke Harigaya , Taku Hayakawa , Masahiro Kawasaki , Shuichiro Yokoyama This is my paper
classification hep-ph astro-ph.CO
keywords isocurvatureperturbationsmodelbaryonmattercurvatonobservationssneutrino
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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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  1. Reviving the Affleck-Dine Curvaton Scenario with Compensated Isocurvature Perturbations

    astro-ph.CO 2026-07 conditional novelty 6.0

    The Affleck-Dine field can act as both baryogenesis engine and curvaton if gravitino dark matter, produced before curvaton decay, supplies the compensating isocurvature perturbation that hides the baryon isocurvature ...