Running of featureful primordial power spectra
نویسندگان
چکیده
منابع مشابه
Running from Features: Optimized Evaluation of Inflationary Power Spectra
In models like axion monodromy, temporal features during inflation which are not associated with its ending can produce scalar, and to a lesser extent, tensor power spectra where deviations from scale-free power law spectra can be as large as the deviations from scale invariance itself. Here the standard slow-roll approach breaks down since its parameters evolve on an efolding scale N much smal...
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Ana Achúcarro, Jinn-Ouk Gong, Gonzalo A. Palma, and Subodh P. Patil* Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, 2333 CA Leiden, The Netherlands Department of Theoretical Physics, University of the Basque Country, 48080 Bilbao, Spain Theory Division, CERN, CH-1211 Genève 23, Switzerland Asia Pacific Center for Theoretical Physics, Pohang 790-784, Korea Department of Physics,...
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I discuss how parameters describing inflation in the very early universe may be related to primordial perturbation spectra. Precision observations of anisotropies in the cosmic microwave background (CMB) such as those provided by the WMAP satellite offer an unprecedented window onto the physics of the very early universe. To theorists exploring speculative models of physics at high energies, th...
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The combined analysis of the cosmic microwave background on large scales and Lyman-α forest on small scales provides a sufficiently long lever arm to obtain strong constraints on the slope and curvature of the power spectrum of primordial density fluctuations. We present results from the combination of the first year WMAP data and the dark matter power spectrum inferred by Viel et al. (2004) fo...
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The combination of the first-year Wilkinson Microwave Anisotropy Probe (WMAP) data with other finer scale cosmic microwave background (CMB) experiments (CBI and ACBAR) and two structure formation measurements (2dFGRS and Lyman α forest) suggest a ΛCDM cosmological model with a running spectral power index of primordial density fluctuations. Motivated by this new result on the index of primordia...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2017
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.95.123534