Constrained inflaton due to a complex scalar
High Energy Physics - Phenomenology
2015-12-02 v3 Cosmology and Nongalactic Astrophysics
Abstract
We reexamine inflation due to a constrained inflaton in the model of a complex scalar. Inflaton evolves along a spiral-like valley of special scalar potential in the scalar field space just like single field inflation. Sub-Planckian inflaton can induce sufficient -foldings because of a long slow-roll path. In a special limit, the scalar spectral index and the tensor-to-scalar ratio has equivalent expressions to the inflation with monomial potential . The favorable values for them could be obtained by varying parameters in the potential. This model could be embedded in a certain radiative neutrino mass model.
Cite
@article{arxiv.1505.05955,
title = {Constrained inflaton due to a complex scalar},
author = {Romy H. S. Budhi and Shoichi Kashiwase and Daijiro Suematsu},
journal= {arXiv preprint arXiv:1505.05955},
year = {2015}
}
Comments
16 pages, 4 figures