Observational constraints on the energy scale of inflation

Abstract

Determining the energy scale of inflation is crucial to understand the nature of inflation in the early Universe. We place observational constraints on the energy scale of the observable part of the inflaton potential by combining the 7-year Wilkinson Microwave Anisotropy Probe data with distance measurements from the baryon acoustic oscillations in the distribution of galaxies and the Hubble constant measurement. Our analysis provides an upper limit on this energy scale, 2.3 \times 10^{16} GeV at 95% confidence level. Moreover, we forecast the sensitivity and constraints achievable by the Planck experiment by performing Monte Carlo studies on simulated data. Planck could significantly improve the constraints on the energy scale of inflation and on the shape of the inflaton potential.

7 pages, 3 figures, RevTeX, published version

References in corpus (11)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The Standard Model Higgs boson as the inflaton
• Inflation after WMAP3: Confronting the Slow-Roll and Exact Power Spectra with CMB Data
• Probing cosmological parameters with the CMB: Forecasts from full Monte Carlo simulations
• Power spectra from an inflaton coupled to the Gauss-Bonnet term
• MCMC analysis of WMAP3 and SDSS data points to broken symmetry inflaton potentials and provides a lower bound on the tensor to scalar ratio
• Constraining Fundamental Physics with Future CMB Experiments
• New constraints on the observable inflaton potential from WMAP and SDSS
• ${\varphi }^4$ inflation is not excluded
• The WMAP normalization of inflationary cosmologies
• Supernova, baryon acoustic oscillations, and CMB surface distance constraints on f(G) higher order gravity models

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