Remarks on Two Gamma Ray Lines from the Inner Galaxy
arXiv:1207.1537
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.
arXiv comment5 pages
References in corpus (15)
- A Tentative Gamma-Ray Line from Dark Matter Annihilation at the Fermi Large Area Telescope
- Dark matter constraints from box-shaped gamma-ray features
- Strong Evidence for Gamma-ray Line Emission from the Inner Galaxy
- What if Dark Matter Gamma-Ray Lines come with Gluon Lines?
- 130 GeV dark matter and the Fermi gamma-ray line
- Implications of a 130 GeV Gamma-Ray Line for Dark Matter
- Dirac right-handed sneutrino dark matter and its signature in the gamma-ray lines
- A 130 GeV photon line from dark matter annihilation in the NMSSM
- Fermi Gamma Ray Line at 130 GeV from Axion-Mediated Dark Matter
- 130 GeV Fermi gamma-ray line from dark matter decay
- Spectral and spatial variations of the diffuse gamma-ray background in the vicinity of the Galactic plane and possible nature of the feature at 130 GeV
- Brightening the (130 GeV) Gamma-Ray Line
- PAMELA/Fermi-LAT electron cosmic ray spectrum at 100 GeV: implication for dark matter annihilation signal in accordance with the 130 GeV -ray line
- Mixed Wino-Axion Dark Matter in String/M Theory and the 130 GeV Gamma-line "Signal"
- Velocity of Light in Dark Matter with Charge