Tensor Modes in Pure Natural Inflation
High Energy Physics - Phenomenology
2018-03-16 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Lattice
High Energy Physics - Theory
Abstract
We study tensor modes in pure natural inflation (arXiv:1706.08522), a recently-proposed inflationary model in which an axionic inflaton couples to pure Yang-Mills gauge fields. We find that the tensor-to-scalar ratio r is naturally bounded from below. This bound originates from the finiteness of the number of metastable branches of vacua in pure Yang-Mills theories. Details of the model can be probed by future cosmic microwave background experiments and improved lattice gauge theory calculations of the theta-angle dependence of the vacuum energy.
Keywords
Cite
@article{arxiv.1711.10490,
title = {Tensor Modes in Pure Natural Inflation},
author = {Yasunori Nomura and Masahito Yamazaki},
journal= {arXiv preprint arXiv:1711.10490},
year = {2018}
}
Comments
6 pages, 6 figures; v2: journal version