Large non-Gaussianity generated after D-term inflation by right-handed sneutrino curvaton
Journal Article
·
· Journal of Cosmology and Astroparticle Physics
- Department of Physics, National Tsing Hua University, Hsinchu 300, Taiwan (China)
In this paper, we consider large non-Gaussianity generated after D-term inflation in the case that the adiabatic curvature perturbation produced is dominated by a right-handed (RH) sneutrino curvaton. The cosmic string problem can also be evaded with around 10% contribution to the CMB power spectrum and the spectral index n{sub s} ≅ 1. The non-Gaussianity produced can be as large as 10 < f{sub NL} < 100 for the right-handed sneutrino mass being around m{sub Φ} = 100 GeV with the Yukawa coupling λ{sub ν} ∼ 10{sup −10}. In this case, the lightest neutrino mass is 10{sup −10} eV which favors RH sneutrino leptogenesis.
- OSTI ID:
- 22273135
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 06 Vol. 2009; ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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