Angular Power Spectrum in Modular Invariant Inflation Model

Hayashi, Mitsuo J; Okame, Y; Takagi, K; Watanabe, T; Hirai, S; Takami, T

doi:10.1063/1.2947712

Title: Angular Power Spectrum in Modular Invariant Inflation Model

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Abstract

A scalar potential of inflation is proposed and the angular power spectra of the adiabatic density perturbations are computed. The potential consists of three scalar fields, S, Y and T, together with two free parameters. By fitting the parameters to cosmological data at the fixed point T = 1, we find that the potential behaves like the single-field potential of S, which slowly rolls down. We further show that the inflation predictions corresponding to this potential provide a good fit to the recent three-year WMAP data, e.g. the spectral index n{sub s} = 0.951.The TT and TE angular power spectra obtained from our model almost completely coincide with the corresponding results obtained from the {lambda}CDM model. We conclude that our model is considered to be an adequate theory of inflation that explains the present data.

Authors:

Hayashi, Mitsuo J; Okame, Y; Takagi, K; Watanabe, T ^[1]; Hirai, S; Takami, T ^[2]

Department of Physics, Tokai University, 1117 Kitakaname, Hiratsuka, 259-1292 (Japan)
Department of Digital Games, Osaka Electro-Communication University, 1130-70 Kiyotaki, Shijonawate, Osaka, 575-0063 (Japan)

Publication Date:: Thu May 29 00:00:00 EDT 2008

OSTI Identifier:: 21143533

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1018; Journal Issue: 1; Conference: 9. international symposium on frontiers of fundamental and computational physics, Udine and Trieste (Italy), 7-9 Jan 2008; Other Information: DOI: 10.1063/1.2947712; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGY; DENSITY; DISTURBANCES; ENERGY SPECTRA; INFLATIONARY UNIVERSE; POTENTIALS; RELICT RADIATION; SCALAR FIELDS; SUPERSYMMETRY

Citation Formats


                    Hayashi, Mitsuo J, Okame, Y, Takagi, K, Watanabe, T, Hirai, S, and Takami, T. Angular Power Spectrum in Modular Invariant Inflation Model.  United States: N. p., 2008. 
        Web.  doi:10.1063/1.2947712.

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                    Hayashi, Mitsuo J, Okame, Y, Takagi, K, Watanabe, T, Hirai, S, & Takami, T. Angular Power Spectrum in Modular Invariant Inflation Model.  United States.  https://doi.org/10.1063/1.2947712

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                    Hayashi, Mitsuo J, Okame, Y, Takagi, K, Watanabe, T, Hirai, S, and Takami, T. 2008.  
        "Angular Power Spectrum in Modular Invariant Inflation Model".  United States.  https://doi.org/10.1063/1.2947712.

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@article{osti_21143533,

  title        = {Angular Power Spectrum in Modular Invariant Inflation Model},

  author       = {Hayashi, Mitsuo J and Okame, Y and Takagi, K and Watanabe, T and Hirai, S and Takami, T},

  abstractNote = {A scalar potential of inflation is proposed and the angular power spectra of the adiabatic density perturbations are computed. The potential consists of three scalar fields, S, Y and T, together with two free parameters. By fitting the parameters to cosmological data at the fixed point T = 1, we find that the potential behaves like the single-field potential of S, which slowly rolls down. We further show that the inflation predictions corresponding to this potential provide a good fit to the recent three-year WMAP data, e.g. the spectral index n{sub s} = 0.951.The TT and TE angular power spectra obtained from our model almost completely coincide with the corresponding results obtained from the {lambda}CDM model. We conclude that our model is considered to be an adequate theory of inflation that explains the present data.},

  doi          = {10.1063/1.2947712},

  url          = {https://www.osti.gov/biblio/21143533},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 1018,

  place        = {United States},

  year         = {Thu May 29 00:00:00 EDT 2008},

  month        = {Thu May 29 00:00:00 EDT 2008}

}

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