Observational constraints on assisted k-inflation

Junko Ohashi; Shinji Tsujikawa

Observational constraints on assisted k-inflation

Research output: Contribution to conference › Paper › peer-review

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 n_s of curvature perturbations, (ii) the tensor-to-scalar ratio r, and (iii) the non-Gaussianity parameter f_nl. This will be useful to constrain such models from future high-precision observations of the temperature anisotropies in Cosmic Microwave Background (CMB).

Original language	English
Pages	315-318
Number of pages	4
Publication status	Published - 2010
Externally published	Yes
Event	20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 - Kyoto, Japan Duration: 2010 Sept 21 → 2010 Sept 25

Other

Other	20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010
Country/Territory	Japan
City	Kyoto
Period	10/9/21 → 10/9/25

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

Cite this

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title = "Observational constraints on assisted k-inflation",

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).",

author = "Junko Ohashi and Shinji Tsujikawa",

year = "2010",

language = "English",

pages = "315--318",

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TY - CONF

T1 - Observational constraints on assisted k-inflation

AU - Ohashi, Junko

AU - Tsujikawa, Shinji

PY - 2010

Y1 - 2010

N2 - 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).

AB - 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).

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UR - http://www.scopus.com/inward/citedby.url?scp=84887426831&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:84887426831

SP - 315

EP - 318

T2 - 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010

Y2 - 21 September 2010 through 25 September 2010

ER -

Observational constraints on assisted k-inflation

Abstract

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ASJC Scopus subject areas

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