Fragmentation functions at next-to-next-to-leading order accuracy
Fragmentation functions at next-to-next-to-leading order accuracy
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DOI：
10.1103/physrevd.92.114017
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发表时间：
2015-12-14
影响因子：
5
通讯作者：
Ringer, Felix
中科院分区：
文献类型：
--
作者：
Anderle, Daniele P.;Stratmann, Marco;Ringer, Felix
基于正负电子湮灭中的单π介子产生，我们首次分析了QCD中部分子到π介子的碎裂函数。特别强调的是，必要的技术细节进行QCD尺度演化和截面计算梅林矩空间。我们演示了如何描述的数据和理论的不确定性得到改善时，次到次到领先的阶QCD修正。
We present a first analysis of parton-to-pion fragmentation functions at next-to-next-to-leading order accuracy in QCD based on single-inclusive pion production in electron-positron annihilation. Special emphasis is put on the technical details necessary to perform the QCD scale evolution and cross section calculation in Mellin moment space. We demonstrate how the description of the data and the theoretical uncertainties are improved when next-to-next-to-leading order QCD corrections are included.