反物质对暗物质的间接探测：揭开块状增强因素的神秘面纱
Indirect detection of Dark Matter with antimatter: Demystifying the clumpiness boost factors
摘要：
在$Λ$宇宙学框架下，结构形成的层次方案预测了暗物质（DM）子晕的存在，其最小尺寸取决于DM的微观性质。在湮灭DM的背景下，这样的子结构预计将提高银河系中DM湮灭产生的初级宇宙线（CR）通量。这种增强作用长期以来一直被用来预测反物质CR谱上DM湮灭的印记。利用Lavalle等人（2007 b）开发的方法，我们（Lavalle等人，2007 a）准确地计算了正电子和反质子的助推因子，以及相关的理论和统计误差。为此，我们使用宇宙学N体模拟的最新结果和文献中发现的理论见解的汇编。我们发现，子晕不太可能显着提高反物质CRs的异国情调的生产。
英文摘要：
The hierarchical scenario of structure formation, in the frame of the $Λ$-CDM cosmology, predicts the existence of dark matter (DM) sub-halos down to very small scales, of which the minimal size depends on the microscopic properties of the DM. In the context of annihilating DM, such substructures are expected to enhance the primary cosmic ray (CR) fluxes originating from DM annihilation in the Galaxy. This enhancement has long been invoked to allow predictions of imprints of DM annihilation on the antimatter CR spectra. Taking advantage of the method developed by Lavalle et al (2007b), we (Lavalle et al, 2007a) accurately compute the boost factors for positrons and anti-protons, as well as the associated theoretical and statistical errors. To this aim, we use a compilation of the latest results of cosmological N-body simulations and the theoretical insights found in the literature. We find that sub-halos are not likely to significantly boost the exotic production of antimatter CRs.
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