Supported by National Natural Science Foundation of China(11105124,11105125,11375001,11675147,11675242);the Open Project Program of State Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences(Y5KF121CJ1);the Innovation Talent project of Henan Province(15HASTIT017);the Young-Talent Foundation of Zhengzhou University,the CAS Center for Excellence in Particle Physics(CCEPP);the CAS Key Research Program of Frontier Sciences and a Key R&D Program of Ministry of Science and Technology of China(2017YFA0402200-04)
We propose to interpret the DAMPE electron excess at 1.5 TeV through scalar or Dirac fermion dark matter (DM) annihilation with doubly charged scalar mediators that have lepton-specific Yukawa couplings. The hierarc...