论文标题
$ k_s^0 $和$λ/\barλ$的第一个NNLO碎片函数及其在存在强子质量校正的情况下的不确定性
First NNLO fragmentation functions of $K_S^0$ and $Λ/\barΛ$ and their uncertainties in the presence of hadron mass corrections
论文作者
论文摘要
当前论文通过QCD分析（SIA）的QCD分析列出了$ k^0_s $和$λ/\barλ$碎片函数（FFS）。我们的FFS确定是在近代领先顺序（NLO）的近代领先顺序（NLO）执行的，这是在扰动量子质量动力学（PQCD）中的近代到接头顺序（NNLO）精度，该准确性被指定为{\ tt sak20} ffs。这些FF中的每一个都伴随着它们的不确定性，这些不确定性是使用“ Hessian”方法确定的。考虑到强子质量校正，我们清楚地研究了在包含高阶QCD校正后结果的可靠性。我们提供{\ tt sak20} FFS与另一组的可用分析的比较，一般发现合理的协议，也有很大的差异。为了判断拟合质量，我们的理论预测与分析的SIA数据集进行了比较。 {\ tt sak20} ffs在NLO处，NNLO的准确性及其不确定性在标准{\ tt lhapdf}格式中提供，以预测在LHC和Rhic等高能碰撞中的当前和将来测量。
The current paper presents a determination of $K^0_S$ and $Λ/\barΛ$ fragmentation functions (FFs) from QCD analysis of single-inclusive electron-positron annihilation process (SIA). Our FFs determinations are performed at next-to-leading order (NLO), and for the first time, at next-to-next-to-leading order (NNLO) accuracy in perturbative Quantum Chromodynamics (pQCD) which is designated as {\tt SAK20} FFs. Each of these FFs is accompanied by their uncertainties which are determined using the `Hessian' method. Considering the hadron mass corrections, we clearly investigate the reliability of our results upon the inclusion of higher-order QCD correction. We provide comparisons of {\tt SAK20} FFs set with the available analysis from another group, finding in general a reasonable agreement, and also considerable differences. In order to judge the fit quality, our theoretical predictions are compared with the analyzed SIA datasets. {\tt SAK20} FFs at NLO and NNLO accuracy along with their uncertainties are made available in the standard {\tt LHAPDF} format in order to use for predictions of present and future measurements in high-energy collisions such as LHC and RHIC.
