DAMPE Excess from Leptophilic Vector Dark Matter: Model Independent Approach

Abstract

We study all extensions of the Standard Model (SM) with a vector dark matter (VDM) candidate which can explain the peak structure observed by recent DAMPE experiment in electron-positron cosmic ray spectrum. In this regard, we consider all leptophilic renormalizable VDM-SM interactions through scalar, spinor, and vector mediators. We show that only two out of six possible models could produce DAMPE signal by annihilation of VDM with the mass about 1.5 TeV in a nearby subhalo whilst simultaneously satisfying constraints from DM relic density, direct/indirect detection, and the collider bounds. These two models are the ones with scalar/pseudoscalar mediator $\varphi$ with $M_{\varphi }\in [1500,3000]$ GeV.

20 pages, 9 figures

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• EFT analysis of leptophilic dark matter at future electron-positron colliders in the mono-photon and mono-$Z$ channels
• Muonphilic Dark Matter explanation of gamma-ray galactic center excess: a comprehensive analysis
• Light vector dark matter with scalar mediator and muon g-2 anomaly
• Probing Flavor Structure of Cosmic Ray $e^{\mp }$ Spectrum and Implications for Dark Matter Indirect Searches
• Neutrinos from the Sun can discover dark matter-electron scattering
• Two-photon exchange in leptophilic dark matter scenarios