迈向新的D介子碎裂函数
Towards new D meson fragmentation functions
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中文总结 AI 辅助
Hymn合作组基于LEP和LHC数据，在次领头阶精度下提取D介子碎裂函数，分别处理直接与非直接贡献，并给出D^0示例结果。
中文摘要 AI 辅助
重介子（Hymn）合作组利用LEP和LHC的实验数据，对D介子碎裂函数进行了新的提取。我们特别关注微扰QCD应可安全应用的动力学区域，以避免来自高扭效应的影响，这些效应可能导致碎裂函数出现明显的进程依赖性。我们考虑了初态辐射，并作为一个新颖的要素，分别处理了直接产生和非直接产生的贡献。分析在次领头阶精度下进行，并基于蒙特卡洛复制技术进行了不确定性估计。我们在此讨论了$\mathrm{D}^0$的示例性情况，并将$\mathrm{D}^\pm$和$\mathrm{D}^{*,\pm}$的结果留待后续发表。
英文摘要
The Heavy Meson (Hymn) collaboration presents a new extraction of D meson fragmentation functions using experimental data from LEP and LHC. We focus particularly on kinematical regimes where perturbative QCD should be safely applicable to avoid contamination from higher-twist effects which could lead to an apparent process dependence of fragmentation functions. We account for the initial-state radiation and, as a novel ingredient, consider the prompt and non-prompt contributions separately. The analysis is carried out at next-to-leading order accuracy including uncertainty estimation based on Monte-Carlo replica technique. We disucss the exemplary case of $\mathrm{D}^0$ here and defer the results for $\mathrm{D}^\pm$ and $\mathrm{D}^{*,\pm}$ to a forthcoming publication.
