2001/12/27 by Takeo Moroi, Tomo Takahashi, Moroi, Takeo +1
Physics and Astronomy · #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Radio Astronomy Observations and Technology #astro-ph #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0112335
4 pages, 2 figures, talk given at the 5th RESCEU International Symposium on "New Trends in Theoretical and Observational Cosmology," Tokyo, November 2001
arxiv created 2001/12/27 · openalex publication_date 2001/12/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss effects of cosmological moduli fields on the cosmic microwave background (CMB). If a modulus field ϕonce dominates the universe, the CMB we observe today is from the decay of ϕand its anisotropy is affected by the primordial fluctuation in the amplitude of the modulus field. As a result, constraints on the inflaton potential from the CMB anisotropy can be relaxed. In addition, with the cosmological moduli fields, correlated mixture of adiabatic and isocurvature fluctuations may be generated, which results in enhanced CMB angular power spectrum at higher multipoles relative to that of lower ones. Such an enhancement can be an evidence of late time entropy production due to the cosmological moduli fields, and may be observed at on-going and future experiments.