Natural explanation for 130 GeV photon line within vector boson dark matter model

Understand

We present a dark matter model for explaining the observed 130 GeV photon line from the galaxy center.

• The dark matter candidate is a vector boson of mass $m_V$ with a dimensionless coupling to the photon and $Z$ boson.
• The model predicts a double line photon spectrum at energies equal to $m_V$ and $m_V(1-m_Z^2/4m_V^2)$ originating from the dark matter annihilation.
• The same coupling leads to a mono-photon plus missing energy signal at the LHC.