Observational constraints on assisted k-inflation

Junko Ohashi, Shinji Tsujikawa

Research output: Contribution to conferencePaper

Abstract

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).

Original languageEnglish
Pages315-318
Number of pages4
Publication statusPublished - 2010
Externally publishedYes
Event20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 - Kyoto, Japan
Duration: 2010 Sep 212010 Sep 25

Other

Other20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010
CountryJapan
CityKyoto
Period10/9/2110/9/25

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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  • Cite this

    Ohashi, J., & Tsujikawa, S. (2010). Observational constraints on assisted k-inflation. 315-318. Paper presented at 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010, Kyoto, Japan.