Speaker
Description
We study gamma-ray line signatures from electroweakly interacting non-abelian spin-1 dark matter (DM). In this model, Z_2-odd spin-1 particles including DM candidate have the SU(2)_L triplet-like features, and the Sommerfeld enhancement significantly affects the annihilation processes. The spin-1 DM system has additional partial wave contributions with the higher total spin angular momentum. Consequently, our spin-1 DM predicts the larger annihilation cross sections into 2gamma/Z gamma than those for the SU(2)_L triplet spin-0/spin-1/2 DM. Our spin-1 DM also has a new annihilation mode into a photon and Z_2-even extra heavy vector. The photon energy depends on the mass of DM and the heavy vector, which provides a chance to seek the mass spectrum.We show the current bounds and the prospect sensitivity of the future gamma-ray observation.
