Simplified TeV leptophilic dark matter in light of DAMPE data

Abstract Using a simplified framework, we attempt to explain the recent DAMPE cosmic e + + e − flux excess by leptophilic Dirac fermion dark matter (LDM). The scalar (Φ0) and vector (Φ1) mediator fields connecting LDM and Standard Model particles are discussed. We find that the couplings P ⊗ S, P ⊗ P, V ⊗ A and V ⊗ V can produce the right bump in e + + e − flux for a DM mass around 1.5 TeV with a natural thermal annihilation cross-section < σv >∼ 3×10−26 cm 3 /s today. Among them, V ⊗V coupling is tightly constrained by PandaX-II data (although LDM-nucleus scattering appears at one-loop level) and the surviving samples appear in the resonant region, mΦ1≃2mχ $$ {m_{\varPhi}}_{{}_1}\simeq 2{m}_{\chi } $$. We also study the related collider signatures, such as dilepton production pp → Φ1 → ℓ+ℓ−, and muon g − 2 anomaly. Finally, we present a possible U(1) X realization for such leptophilic dark matter.

Abstract licence: CC BY

37 more references, whose wording the paper’s licence keeps private.

A person counts once a day per paper. We keep no cookie and no address: a reader is a hash that changes every day. Any month under five reads shows no number.