Constraints on moduli cosmology from the production of dark matter and baryon isocurvature fluctuations

Abstract

We set constraints on moduli cosmology from the production of dark matter -- radiation and baryon -- radiation isocurvature fluctuations through modulus decay, assuming the modulus remains light during inflation. We find that the moduli problem becomes worse at the perturbative level as a significant part of the parameter space m_σ(modulus mass) -- σ_{inf} (modulus vev at the end of inflation) is constrained by the non-observation of significant isocurvature fluctuations. We discuss in detail the evolution of the modulus vev and perturbations, in particular the consequences of Hubble scale corrections to the modulus potential and the stochastic motion of the modulus during inflation. We show, in particular, that a high modulus mass scale m_σ> 100 TeV, which allows the modulus to evade big-bang nucleosynthesis constraints is strongly constrained at the perturbative level. We find that generically, solving the moduli problem requires the inflationary scale to be much smaller than 10^{13} GeV.

46 pages, 8 figures (revtex) -- v2: an important correction on the amplitude/transfer of isocurvature modes at the end of inflation, typos corrected, references and discussion added, basic result unchanged

References in corpus (14)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• Inflation after WMAP3: Confronting the Slow-Roll and Exact Power Spectra with CMB Data
• Effects of cold dark matter decoupling and pair annihilation on cosmological perturbations
• Moduli-Induced Gravitino Problem
• Non-thermal Dark Matter and the Moduli Problem in String Frameworks
• Moduli Decays and Gravitinos
• Generation of fluctuations during inflation: comparison of stochastic and field-theoretic approaches
• Constraining Isocurvature Initial Conditions with WMAP 3-year data
• Non-gaussianity and cosmic uncertainty in curvaton-type models
• Correlated isocurvature perturbations from mixed inflaton-curvaton decay
• Dark Energy and the MSSM
• Neutralino Dark Matter and the Curvaton
• Curvaton Decay into Baryons, anti-Baryons and Radiation

Cited by in corpus (16)

• Cosmological Moduli and the Post-Inflationary Universe: A Critical Review
• Stochastic growth of quantum fluctuations during slow-roll inflation
• Local non-Gaussianity from inflation
• Non-thermal Histories and Implications for Structure Formation
• Non-Gaussianity from resonant curvaton decay
• Dark Matter and Gravity Waves from a Dark Big Bang
• CMB constraint on non-Gaussianity in isocurvature perturbations
• General treatment of isocurvature perturbations and non-Gaussianities
• Constraints on scalar and tensor perturbations in phenomenological and two-field inflation models: Bayesian evidences for primordial isocurvature and tensor modes
• Constraining SUSY with Heavy Scalars -- using the CMB
• Primordial Trispectrum from Isocurvature Fluctuations
• Elementary Theorems Regarding Blue Isocurvature Perturbations
• Compensation for large tensor modes with iso-curvature perturbations in CMB anisotropies
• Gravitino Dark Matter and Non-Gaussianity
• Extended analysis of CMB constraints on non-Gaussianity in isocurvature perturbations
• The moduli problem at the perturbative level