Power spectra from an inflaton coupled to the Gauss-Bonnet term

Guo Z-K, Schwarz D (2009)
PHYSICAL REVIEW D 80(6).

Journal Article | Published | English

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Abstract
We consider power-law inflation with a Gauss-Bonnet correction inspired by string theory. We analyze the stability of cosmological perturbations and obtain the allowed parameter space. We find that for Gauss-Bonnet-dominated inflation ultraviolet instabilities of either scalar or tensor perturbations show up on small scales. The Gauss-Bonnet correction with a positive (or negative) coupling may lead to a reduction (or enhancement) of the tensor-to-scalar ratio in the potential-dominated case. We place tight constraints on the model parameters by making use of the WMAP 5-year data.
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Guo Z-K, Schwarz D. Power spectra from an inflaton coupled to the Gauss-Bonnet term. PHYSICAL REVIEW D. 2009;80(6).
Guo, Z. - K., & Schwarz, D. (2009). Power spectra from an inflaton coupled to the Gauss-Bonnet term. PHYSICAL REVIEW D, 80(6).
Guo, Z. - K., and Schwarz, D. (2009). Power spectra from an inflaton coupled to the Gauss-Bonnet term. PHYSICAL REVIEW D 80.
Guo, Z.-K., & Schwarz, D., 2009. Power spectra from an inflaton coupled to the Gauss-Bonnet term. PHYSICAL REVIEW D, 80(6).
Z.-K. Guo and D. Schwarz, “Power spectra from an inflaton coupled to the Gauss-Bonnet term”, PHYSICAL REVIEW D, vol. 80, 2009.
Guo, Z.-K., Schwarz, D.: Power spectra from an inflaton coupled to the Gauss-Bonnet term. PHYSICAL REVIEW D. 80, (2009).
Guo, Zong-Kuan, and Schwarz, Dominik. “Power spectra from an inflaton coupled to the Gauss-Bonnet term”. PHYSICAL REVIEW D 80.6 (2009).
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