The k-inflation models can give rise to large non-Gaussianities of primordial density perturbations because the field propagation speed is different from the speed of light. For assisted k-inflation models in which multiple scalar fields join an effective singlefield attractor, we evaluate three observables: (i) the spectral index ns of curvature perturbations, (ii) the tensor-to-scalar ratio r, and (iii) the non-Gaussianity parameter fnl. This will be useful to constrain such models from future high-precision observations of the temperature anisotropies in Cosmic Microwave Background (CMB).
|出版ステータス||Published - 2010|
|イベント||20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 - Kyoto, Japan|
継続期間: 2010 9 21 → 2010 9 25
|Other||20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010|
|Period||10/9/21 → 10/9/25|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics