The 3.5 keV X-ray line signal from decaying moduli with low cutoff scale
High Energy Physics - Phenomenology
2014-07-15 v1 Cosmology and Nongalactic Astrophysics
High Energy Astrophysical Phenomena
Abstract
The recent unidentified 3.5 keV X-ray line signal can be explained by decaying moduli dark matter with a cutoff scale one order of magnitude smaller than the Planck scale. We show that such modulus field with the low cutoff scale follows a time-dependent potential minimum and its abundance is reduced by the adiabatic suppression mechanism. As a result the modulus abundance can naturally be consistent with the observed dark matter abundance without any fine-tuning of the initial oscillation amplitude.
Keywords
Cite
@article{arxiv.1403.1733,
title = {The 3.5 keV X-ray line signal from decaying moduli with low cutoff scale},
author = {Kazunori Nakayama and Fuminobu Takahashi and Tsutomu T. Yanagida},
journal= {arXiv preprint arXiv:1403.1733},
year = {2014}
}
Comments
6 pages