AKK更新：来自新理论输入和实验数据的改进
AKK Update: Improvements from New Theoretical Input and Experimental Data
摘要：
我们对之前AKK提取的次领先顺序的$π^\pm$、$K^\pm$、$p/\bar{p}$、$K_S^0$和$Λ/\barΛ$粒子的碎片函数进行了许多改进。包括强子生产测量从$pp(\bar{p})$反应在BRAHMS，CDF，PHENIX和STAR被添加到数据样本。我们利用$pp$反应中产生的强子的电荷符号不对称性来约束价夸克碎裂。增加了$x$较小和$\sqrt{s}$较低区域中$e^+ e^-$反应的数据。强子质量效应处理的所有可观的，对于每个粒子，强子质量用于描述的$e^+ e^-$反应是适合的。重子的拟合质量仅比它们的真实质量高出约1%，而介子的拟合质量值具有正确的数量级。在$e^+ e^-$反应的系数函数中以及在碎裂函数的演变中应用大的$x$重量化，这在大多数情况下导致最小化的$χ^2$的显著减少。为了进一步利用数据，所有公布的归一化误差都通过相关矩阵合并。
英文摘要：
We perform a number of improvements to the previous AKK extraction of fragmentation functions for $π^\pm$, $K^\pm$, $p/\bar{p}$, $K_S^0$ and $Λ/\barΛ$ particles at next-to-leading order. Inclusive hadron production measurements from $pp(\bar{p})$ reactions at BRAHMS, CDF, PHENIX and STAR are added to the data sample. We use the charge-sign asymmetry of the produced hadrons in $pp$ reactions to constrain the valence quark fragmentations. Data from $e^+ e^-$ reactions in regions of smaller $x$ and lower $\sqrt{s}$ are added. Hadron mass effects are treated for all observables and, for each particle, the hadron mass used for the description of the $e^+ e^-$ reaction is fitted. The baryons' fitted masses are found to be only around 1% above their true masses, while the values of the mesons' fitted masses have the correct order of magnitude. Large $x$ resummation is applied in the coefficient functions of the $e^+ e^-$ reactions, and also in the evolution of the fragmentation functions, which in most cases results in a significant reduction of the minimized $χ^2$. To further exploit the data, all published normalization errors are incorporated via a correlation matrix.
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