论文标题
通过DAMPE测量的宇宙射线次级和主要比率的解释
Interpretations of the cosmic ray secondary-to-primary ratios measured by DAMPE
论文作者
论文摘要
DAMPE对硼与碳与氧气比的精确测量显示出明显的硬质，这在$ 100 $ GEV/N左右，这对银河宇宙射线的生产，传播和相互作用产生了重要意义。在这项工作中，我们根据Dampe的发现，研究了文献中提出的许多模型。这些模型可以大致分为两个类别，这些模型是由传播效应或源驱动的。在讨论的这些模型中，我们发现宇宙射线在传播过程中通过随机的磁性流动力波的传播重新加速可能不会再现足够的B/C和B/O的足够硬蚀，并且需要额外的扩散系数的光谱破裂。其他模型可以正确解释该比率的硬化。但是，根据所假定的简化，模型在重现广泛能源范围内的数据方面的质量有所不同。具有明显重新加速效应的模型将低估的低能抗抗原子但过度预测的低能量正电子，并且在源中有二次生产的模型预测过高预测的高能抗脂蛋白。对于所有高能正电子过多的模型。
Precise measurements of the boron-to-carbon and boron-to-oxygen ratios by DAMPE show clear hardenings around $100$ GeV/n, which provide important implications on the production, propagation, and interaction of Galactic cosmic rays. In this work we investigate a number of models proposed in literature in light of the DAMPE findings. These models can roughly be classified into two classes, driven by propagation effects or by source ones. Among these models discussed, we find that the re-acceleration of cosmic rays, during their propagation, by random magnetohydrodynamic waves may not reproduce sufficient hardenings of B/C and B/O, and an additional spectral break of the diffusion coefficient is required. The other models can properly explain the hardenings of the ratios. However, depending on simplifications assumed, the models differ in their quality in reproducing the data in a wide energy range. The models with significant re-acceleration effect will under-predict low-energy antiprotons but over-predict low-energy positrons, and the models with secondary production at sources over-predict high-energy antiprotons. For all models high-energy positron excess exists.
