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arXiv · 1311.6770

Supergravity Inflation with Broken Shift Symmetry and Large Tensor-to-Scalar Ratio

Tianjun Li·Zhijin Li·Dimitri V. Nanopoulos
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Abstract

We propose a class of inflation models with potential V(ϕ)=αϕ^n exp(-β^m ϕ^m). We show that such kind of inflaton potentials can be realized in supergravity theory with a small shift symmetry breaking term in the Kähler potential. We find that the models with (m=1, n=1), (m=1, n=2), (m=2, n=1), and (m=2, n=3/2) can easily accommodate the Planck results. In particular, the tensor-to-scalar ratio is larger than 0.01 in the 1σregion. Thus, these models generate the typical large field inflation, and can be tested at the future Planck and QUBIC experiments.

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Tianjun Li, Zhijin Li, Dimitri V. Nanopoulos. 2014-04-03. Supergravity Inflation with Broken Shift Symmetry and Large Tensor-to-Scalar Ratio. https://doi.org/10.1088/1475-7516%2F2014%2F02%2F028

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