Enhancing the tensor-to-scalar ratio in simple inflation

Details Enhancing the tensor-to-scalar ratio in simple inflation Enhancing the tensor-to-scalar ratio in simple inflation

2005-12-02

arxiv.org/abs/astro-ph/0512066v2

JCAP 0602 (2006) 004

Astronomy and Astrophysics

Astrophysics

9 pages, 1 figure and references are added, discussion is slightly extended, published version

Scientific paper

10.1088/1475-7516/2006/02/004

We show that in theories with a nontrivial kinetic term the contribution of the gravitational waves to the CMB fluctuations can be substantially larger than that is naively expected in simple inflationary models. This increase of the tensor-to-scalar perturbation ratio leads to a larger B-component of the CMB polarization, thus making the prospects for future detection much more promising. The other important consequence of the considered model is a higher energy scale of inflation and hence higher reheating temperature compared to a simple inflation.

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