Prospects for detecting a net photon circular polarization produced by decaying dark matter
Prospects for detecting a net photon circular polarization produced by decaying dark matter
If dark matter interactions with Standard Model particles are $CP$-violating, then dark matter annihilation/decay can produce photons with a net circular polarization. We consider the prospects for experimentally detecting evidence for such a circular polarization. We identify optimal models for dark matter interactions with the Standard Model, from the point …