Supergravity Inflation with Broken Shift Symmetry and Large Tensor-to-Scalar Ratio
High Energy Physics - Phenomenology
2015-06-18 v2 High Energy Physics - Theory
Abstract
We propose a class of inflation models with potential V(\phi)=\alpha \phi^n exp(-\beta^m \phi^m). We show that such kind of inflaton potentials can be realized in supergravity theory with a small shift symmetry breaking term in the K\"ahler 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 1\sigma region. Thus, these models generate the typical large field inflation, and can be tested at the future Planck and QUBIC experiments.
Keywords
Cite
@article{arxiv.1311.6770,
title = {Supergravity Inflation with Broken Shift Symmetry and Large Tensor-to-Scalar Ratio},
author = {Tianjun Li and Zhijin Li and Dimitri V. Nanopoulos},
journal= {arXiv preprint arXiv:1311.6770},
year = {2015}
}
Comments
Revtex4, 14 pages, 4 figures, version in JCAP