3 years ago

Neutrino and Dark Matter Confronting DAMPE Excess.

Lei Feng, Zhi-Long Han, Ran Ding, Bin Zhu

The DArk Matter Particle Explorer (DAMPE) has observed a tentative peak at $E\sim1.4~\TeV$ in the cosmic-ray electrons spectrum. In this paper, we interpret such excess in the scotogenic type-II seesaw model. The model generate tiny neutrino masses at one-loop level with dark matter (DM) candidate. With introducing a nearby DM subhalo, the DAMPE excess can be explained by DM annihilates into a pair of triplet scalars which subsequently decaying to charged lepton final states. Spectrum fitting of DAMPE excess indicates it strongly favors the inverted neutrino mass hierarchy. We also discuss how to evade associated neutrino flux in our model.

Publisher URL: http://arxiv.org/abs/1712.02021

DOI: arXiv:1712.02021v2

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