Gauss-Bonnet braneworld and WMAP three year results

Abstract

We compare predictions for the spectral index and tensor-scalar ratio in models of patch inflation with the WMAP three year data. There are three cases of these models of inflation, which arise in the Gauss-Bonnet braneworld scenario: Gauss-Bonnet (GB), Randall-Sundrum (RS), and 4D general relativity (GR). We consider the large-field potential $V\propto {\varphi }^p$ in both commutative and noncommutative spacetimes, and find that in the cases of the GB and GR patch cosmologies, the quadratic potential is observationally favored, while the quartic potential is ruled out in most patches. Strong noncommutative inflation is excluded in all cases because it leads to a blue-tilted scalar spectral index.

14 pages, 7 figures, 2 tables, and version to appear in PLB

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• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
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• Observational constraints on patch inflation in noncommutative spacetime
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• Brane Inflation After WMAP Three Year Results
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• Running Spectral Index in Noncommutative Inflation and WMAP Three Year Results
• Noncommutative KKLMMT Model
• Observational constraints and cosmological parameters
• Understanding selection effects in observed samples of cataclysmic variables
• Inflation after WMAP3

Cited by in corpus (6)

• Strong Planck constraints on braneworld and non-commutative inflation
• Intermediate inflation in Gauss-Bonnet braneworld
• Complete noncommutativity in a cosmological model with radiation
• Slow-roll reconstruction for running spectral index
• Open Inflationary Universes in Gauss-Bonnet Brane Cosmology
• Closed inflationary universe in Patch Cosmology