| Title | Confronting the DAMPE excess with the scotogenic type-II seesaw model |
| Authors | Ding, Ran Han, Zhi-Long Feng, Lei Zhu, Bin |
| Affiliation | Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China. Univ Jinan, Sch Phys & Technol, Jinan 250022, Shandong, Peoples R China. Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China. Yantai Univ, Dept Phys, Yantai 264005, Peoples R China. |
| Keywords | dark matter radiative neutrino mass model DAMPE excess DARK-MATTER PROPAGATION POSITRONS |
| Issue Date | 2018 |
| Publisher | CHINESE PHYSICS C |
| Citation | CHINESE PHYSICS C. 2018, 42(8). |
| Abstract | The DArk Matter Particle Explorer (DAMPE) has observed a tentative peak at E similar to 1.4 TeV in the cosmic-ray electron spectrum. In this paper, we interpret this excess in the scotogenic type-II seesaw model. This model extends the canonical type-II seesaw model with dark matter (DM) candidates and a loop-induced vacuum expectation value of the triplet scalars, v(Delta), resulting in small neutrino masses naturally even for TeV scale triplet scalars. Assuming a nearby DM subhalo, the DAMPE excess can be explained by DM annihilating into a pair of triplet scalars which subsequently decay to charged lepton final states. Spectrum fitting of the DAMPE excess indicates it potentially favors the inverted neutrino mass hierarchy. We also discuss how to evade associated neutrino flux in our model. |
| URI | http://hdl.handle.net/20.500.11897/523083 |
| ISSN | 1674-1137 |
| DOI | 10.1088/1674-1137/42/8/083104 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
