Angular Power Spectrum in Modular Invariant Inflation Model
- 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)
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.
- OSTI ID:
- 21143533
- Journal Information:
- AIP Conference Proceedings, Vol. 1018, 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); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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