Prospects of type-II seesaw at future colliders in light of the DAMPE $e^{+}{e}^{-}$ excess

Yicong Sui, Yongchao Zhang

The DAMPE $e^{+}{e}^{-}$ excess at around 1.4 TeV could be explained in the type-II seesaw model with a scalar dark mater $D$ which is stabilized by a discrete $Z_2$ symmetry. The simpl…