Fragmentation functions at next-to-next-to-leading order accuracy

被引：53
|
作者：
Anderle, Daniele P. [1 ]
Stratmann, Marco [1 ]
Ringer, Felix [2 ,3 ]
机构：
[1] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany
[2] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
[3] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany
来源：
PHYSICAL REVIEW D | 2015年 / 92卷 / 11期
关键词：
QUANTUM-CHROMODYNAMIC CORRECTIONS; PARTICLE MULTIPLICITY RATIOS; 3-LOOP SPLITTING FUNCTIONS; MELLIN TRANSFORMS; QCD CORRECTIONS; PARTON DISTRIBUTIONS; CHARGED HADRONS; HARMONIC SUMS; HIGGS DECAY; EVOLUTION;
D O I：
10.1103/PhysRevD.92.114017
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页数：15
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