The cosmic ray(CR) positrons and antiprotons are often regarded as the collision products of CR nucleons with the interstellar medium. However this conclusion is challenged by recent experimental data. In this work, we choose the latest AMS-02 data to analyze the astrophysical background of CR positrons and antiprotons with the GALPROP code for CR propagation and the QGSJET-II-04 model for the hadronic interactions. The results show that in low energies the predicted fluxes of CR antiprotons and positrons are consistent with AMS-02 data in the diffusion model combining the re-acceleration and convection terms (DCR model). Thus, the excess of CR antiprotons in the low energy are not justified. In that model, the predicted flux of CR protons is consistent with AMS-02 data whose hardening feature above 330 GeV is also matched. Based on that model, the total fluxes of CR electrons and positrons from AMS-02 are also used to analyzed the interpretation of dark matter annihilation about the positron excess. The predicted best-fit masses of dark matter are from 400 GeV to 4 TeV. The DCR model does not give the unusual interpretation of the positron excess.

中文翻译：

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基于最新 AMS-02 数据的天体物理背景和暗物质含义

宇宙射线（CR）正电子和反质子通常被认为是CR核子与星际介质碰撞的产物。然而，这一结论受到了最近的实验数据的挑战。在这项工作中，我们选择最新的 AMS-02 数据，使用用于 CR 传播的 GALPROP 代码和用于强子相互作用的 QGSJET-II-04 模型来分析 CR 正电子和反质子的天体物理背景。结果表明，在低能量下，CR反质子和正电子的预测通量与结合再加速和对流项的扩散模型（DCR模型）中的AMS-02数据一致。因此，在低能量中过量的 CR 反质子是不合理的。在该模型中，预测的 CR 质子通量与 AMS-02 数据一致，其硬化特征高于 330 GeV。基于该模型，来自AMS-02的CR电子和正电子的总通量也被用于分析关于正电子过剩的暗物质湮灭的解释。预测的最佳暗物质质量为 400 GeV 至 4 TeV。DCR 模型没有给出正电子过剩的异常解释。