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Slow-roll inflation with a Gauss-Bonnet correction · Around

2010

Slow-roll inflation with a Gauss-Bonnet correction

Guo, Zong-Kuan, Schwarz, Dominik J.

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We consider slow-roll inflation for a single scalar field with an arbitrary potential and an arbitrary nonminimal coupling to the Gauss-Bonnet term.

By introducing a combined hierarchy of Hubble and Gauss-Bonnet flow functions, we analytically derive the power spectra of scalar and tensor perturbations.
The standard consistency relation between the tensor-to-scalar ratio and the spectral index of tensor perturbations is broken.
We apply this formalism to a specific model with a monomial potential and an inverse monomial Gauss-Bonnet coupling and constrain it by the 7-year Wilkinson Microwave Anisotropy Probe data.

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