Measuring high energy cosmic ray electrons/positrons (CRE) provides important means for the dark matter (DM) indirect detection and for probing the nearby galactic sources. In this work, we perform a systematic analysis of the flavor structure of DM annihilations into charged leptons based on the cosmic ray CRE spectra measured by DAMPE, Fermi-LAT, AMS-02, and CALET experiments. We study the annihilations of possible TeV scale DM particles in a nearby subhalo, which is proposed to explain the possible peak-like structure of the DAMPE CRE data. We pay special attention to the possible non-resonant excess (besides the possible peak-like structure) and demonstrate that such non-resonant excess can mainly arise from the decay of muons produced by the DM annihilations in the subhalo. With these we study the flavor composition of the lepton final states from DM annihilations $\chi \chi \to e^{+}{e}^{-},{\mu }^{+}{\mu }^{-},{\tau }^{+}{\tau }^{-}$ by fitting the CRE data. We demonstrate that decays of the final states ${\mu }^{+}{\mu }^{-}$ and ${\tau }^{+}{\tau }^{-}$ can provide the non-resonant excess, while the peak excess arises from the $e^{+}{e}^{-}$ final state. We further analyze the constraints on the lepton flavor composition using the Fermi-LAT γ-ray measurements. We find that the flavor composition is consistent with the Fermi-LAT data at relatively low Galactic latitudes, while the fraction of the final state ${\tau }^{\pm }$ is severely bounded.

测量高能宇宙射线电子/正电子（CRE）为暗物质（DM）间接检测和探测附近的银河源提供了重要的手段。在这项工作中，我们基于由DAMPE，Fermi-LAT，AMS-02和CALET实验测量的宇宙射线CRE光谱，对DM hil灭到带电轻子中的DM hil灭的风味结构进行了系统分析。我们研究了可能的TeV尺度DM粒子在附近的次晕中的the灭，这是为了解释DAMPE CRE数据的可能的峰状结构而提出的。我们特别注意可能的非共振过量（除了可能的峰状结构之外），并证明这种非共振过量可能主要由亚晕中DM hil灭产生的介子衰减引起。$\chi \chi \to {Ë}^{+}{Ë}^{-}，{\mu }^{+}{\mu }^{-}，{\tau }^{+}{\tau }^{-}$通过拟合CRE数据。我们证明了最终状态的衰变${\mu }^{+}{\mu }^{-}$ 和 ${\tau }^{+}{\tau }^{-}$ 可以提供非谐振过量，而峰值过量则来自 ${Ë}^{+}{Ë}^{-}$最终状态。我们使用费米-拉特（Fermi-LAT）γ射线测量进一步分析了对轻质蛋白风味成分的限制。我们发现，在相对较低的银河纬度下，风味成分与Fermi-LAT数据一致，而最终状态的分数${\tau }^{\pm }$ 受到严格限制。