Dark matter may be charged under dark electromagnetism with a dark photon that kinetically mixes with the Standard Model photon .
In this framework , dark matter will collect at the center of the Earth and annihilate into dark photons , which may reach the surface of the Earth and decay into observable particles .
We determine the resulting signal rates , including Sommerfeld enhancements , which play an important role in bringing the Earth ’ s dark matter population to their maximal , equilibrium value .
For dark matter masses m _ { X } \sim 100 ~ { } \text { GeV } -10 ~ { } \text { TeV } , dark photon masses m _ { A ^ { \prime } } \sim \text { MeV } - \text { GeV } , and kinetic mixing parameters \varepsilon \sim 10 ^ { -9 } -10 ^ { -7 } , the resulting electrons , muons , photons , and hadrons that point back to the center of the Earth are a smoking-gun signal of dark matter that may be detected by a variety of experiments , including neutrino telescopes , such as IceCube , and space-based cosmic ray detectors , such as Fermi-LAT and AMS .
We determine the signal rates and characteristics , and show that large and striking signals—such as parallel muon tracks—are possible in regions of the ( m _ { A ^ { \prime } } , \varepsilon ) plane that are not probed by direct detection , accelerator experiments , or astrophysical observations .