Interplay of threshold resummation and hadron mass corrections in deep inelastic processes
Interplay of threshold resummation and hadron mass corrections in deep inelastic processes
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DOI：
10.1103/physrevd.91.034008
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发表时间：
2015-02-12
影响因子：
5
通讯作者：
Ringer, Felix
中科院分区：
文献类型：
--
作者：
Accardi, Alberto;Anderle, Daniele P.;Ringer, Felix
我们讨论了深度非弹性散射Ln-L‘X和半包含湮灭e(+)e(-)->；HX过程的强子质量修正和阈值恢复，并给出了在所有运动学阈值下如何将这两个修正一致地结合在一起的处方。在Bjorken x(B)的大范围内，我们发现了阈值恢复和目标质量修正之间的有趣的相互作用。相反，在半包含湮灭中，所考虑的两个校正在不同的运动学区域是相关的，并且不相互影响。尽管如此，根据Babar和Belle最近关于π和Kaon生产的高精度数据，我们仍然有兴趣进行详细的分析，我们将其与我们的计算进行比较。对于深度非弹性散射和单次包含性湮灭，综合修正的大小与世界数据的精度相比都是很大的。因此，我们得出结论，这些理论修正与全球QCD拟合有关，以便提取大Bjorken xB处的精确部分子分布和整个运动学范围内的碎裂函数。
We discuss hadron mass corrections and threshold resummation for deep-inelastic scattering lN - l'X and semi-inclusive annihilation e(+)e(-) -> hX processes, and provide a prescription how to consistently combine these two corrections respecting all kinematic thresholds. We find an interesting interplay between threshold resummation and target mass corrections for deep-inelastic scattering at large values of Bjorken x(B). In semi-inclusive annihilation, on the contrary, the two considered corrections are relevant in different kinematic regions and do not affect each other. A detailed analysis is nonetheless of interest in light of recent high precision data from BABAR and BELLE on pion and kaon production, with which we compare our calculations. For both deep inelastic scattering and single inclusive annihilation, the size of the combined corrections compared to the precision of world data is shown to be large. Therefore, we conclude that these theoretical corrections are relevant for global QCD fits in order to extract precise parton distributions at large Bjorken xB, and fragmentation functions over the whole kinematic range.