论文标题
Fe碎片化对LIBEB分析的重要性：解释AMS-02数据的主要来源是否需要？
The importance of Fe fragmentation for LiBeB analyses: Is a Li primary source needed to explain AMS-02 data?
论文作者
论文摘要
来自AMS-02的LI，BE和B上的高精度数据提供了银河系宇宙射线传输参数的最佳约束。我们重新评估了Fe碎片化对LI，BE和B建模的影响。我们讨论了对传输参数确定的后果和重新评估是否需要LI的主要来源来匹配AMS-02数据。我们对产生LI，BE和B的最重要反应的现有数据重新统治。我们将使用这些新的横截面集的USINE代码重新分析了LI/C，BE/C，BE/C和B/C AMS-02数据。我们建造了三个同样合理的横截面集。与最初的横截面相比，它们导致LI（$ \ sim20-50 \％$）和BE（$ \ sim5-15 \％$）的平均产量增强，而离开B助剂大多没有变化。特别是，发现Fe碎片可导致多达10 \％的Li和Be Fluxes。用于AMS-02 LI/C，BE/C和B/C数据的组合分析中，拟合度得到了显着改善，具有增强的扩散系数（$ \ sim 20 \％）$。发现这三个更新的横截面集可以稍微下调或超过li/c和b/c的比率：这极大地说明了宇宙射线中LI的主要来源的证据。我们强调的是，LI的同位素宇宙射线比（在较小程度上）很快将由AMS-02发布，也受到这些更新集合的使用的影响。几乎没有来自NE，MG，SI和FE的LI和B同位素生产的核数据，而这些反应估计占总生产的$ \ sim 20 \％$。新的核测量值将不胜感激，并有助于更好地利用高精度AMS-02宇宙射线数据。
High-precision data from AMS-02 on Li, Be, and B provide the best constraints on Galactic cosmic-ray transport parameters. We re-evaluate the impact of Fe fragmentation on the Li, Be, and B modelling. We discuss the consequences on the transport parameter determination and reassess whether a primary source of Li is needed to match AMS-02 data. We renormalised several cross-section parametrisations to existing data for the most important reactions producing Li, Be, and B. We used the USINE code with these new cross-section sets to re-analyse Li/C, Be/C, and B/C AMS-02 data. We built three equally plausible cross-section sets. Compared to the initial cross-section sets, they lead to an average enhanced production of Li ($\sim20-50\%$) and Be ($\sim5-15\%$), while leaving the B flux mostly unchanged. In particular, Fe fragmentation is found to contribute to up to 10\% of the Li and Be fluxes. Used in the combined analysis of AMS-02 Li/C, Be/C, and B/C data, the fit is significantly improved, with an enhanced diffusion coefficient ($\sim 20\%)$. The three updated cross-section sets are found to either slightly undershoot or overshoot the Li/C and B/C ratios: this strongly disfavours evidence for a primary source of Li in cosmic rays. We stress that isotopic cosmic-ray ratios of Li (and to a lesser extent Be), soon to be released by AMS-02, are also impacted by the use of these updated sets. Almost no nuclear data exist for the production of Li and B isotopes from Ne, Mg, Si, and Fe, whereas these reactions are estimated to account for $\sim 20\%$ of the total production. New nuclear measurements would be appreciated and help to better exploit the high-precision AMS-02 cosmic-ray data.
