2006/01/23 by Mitsuo J. Hayashi, Shiro Hirai, Hayashi, Mitsuo J. +6
Earth and Planetary Sciences · Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #Geophysics and Gravity Measurements #High Energy Physics - Phenomenology (hep-ph) #Pulsars and Gravitational Waves Research #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0601190
7 pages, 8 figures
arxiv created 2006/01/23 · openalex publication_date 2006/01/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The angular power spectrum is investigated in the model of supergravity, incorporating the target-space duality and the non-perturbative gaugino condensation in the hidden sector. The inflation and supersymmetry breaking occur at once by the interplay between the dilaton field as inflaton and the condensate gauge-singlet field. The model satisfies the slow-roll condition which solves the η-problem. When the particle rolls down along the minimized trajectory of the potential at a duality invariant fixed point T=1, we can obtain the e-fold value ∼ 57. And then the cosmological parameters obtained from our model well match with the recent WMAP data combined with other experiments. The TT and TE angular power spectra also show that our model is compatible with the data for l > 20. However, the best fit value of τin our model is smaller than that of the ΛCDM model. These results suggest that, among supergravity models of inflation, the modular-invariant supergravity seems to open a hope to construct the realistic theory of particles and cosmology.