Leptophilic Dark Matter and AMS-02 Cosmic-ray Positron Flux

Abstract

With the measurement of positron flux published recently by AMS-02 collaboration, we show how the leptophilic dark matter fits the observation. We obtain the percentages of different products of dark matter annihilation that can best describe the flux of high energy positrons observed by AMS. We show that dark matter annihilates predominantly into $\tau \tau$ pair, while both $ee$ and $\mu \mu$ final states should be less than $20\%$. When gauge boson final states are included, the best branching ratio of needed $\tau \tau$ mode reduces.

11 pages, 5 figures

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• Cosmic ray propagation and dark matter in light of the latest AMS-02 data
• Leptophilic dark matter from gauged lepton number: Phenomenology and gravitational wave signatures
• Model-independent analysis of the DAMPE excess
• EFT analysis of leptophilic dark matter at future electron-positron colliders in the mono-photon and mono-$Z$ channels
• New Physics Search at the CEPC: a General Perspective
• Higgs portal dark matter and neutrino mass and mixing with a doubly charged scalar
• Secondary Production as the Origin for the Cosmic Ray Positron Excess
• Neutrinos from the Sun can discover dark matter-electron scattering
• Monochromatic Gamma Rays from Dark Matter Annihilation to Leptons
• Leptophilic Dark Matter at Linear Colliders
• Multicomponent Dark Matter in the Light of CALET and DAMPE
• Laser-assisted neutral Higgs-boson pair production in Inert Higgs Doublet Model (IHDM)