Remarks on Two Gamma Ray Lines from the Inner Galaxy
Abstract
Monochromatic gamma-ray lines are thought to be the smoking gun signal of the annihilation or decay of dark matter since they do not suffer from deflection or absorption on galactic scales. A recent claim on strong evidence for two gamma-ray lines from the inner galaxy suggests that two-body final states might be one photon plus a Z boson or one photon plus a Higgs boson. In this study, we investigate which final state is more possible by analyzing the energy resolution of the Fermi-LAT. It is concluded that the former case, i.e. one photon plus a Z boson is more plausible than the latter one, i.e. one photon and a Higgs boson since in the latter case the mass of dark matter particle shows tension with a constraint coming from the energy resolution of the Fermi-LAT.
Cite
@article{arxiv.1207.1537,
title = {Remarks on Two Gamma Ray Lines from the Inner Galaxy},
author = {Ichiro Oda},
journal= {arXiv preprint arXiv:1207.1537},
year = {2012}
}
Comments
5 pages