Tensor polarization dependent fragmentation functions and e+e-\to V \pi X at high energies
Tensor polarization dependent fragmentation functions and e+e-\to V \pi X at high energies
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DOI：
10.1103/physrevd.94.034003
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发表时间：
2016-05
影响因子：
5
通讯作者：
Kai-bao Chen;Wei-hua Yang;Shu-yi Wei;Z. Liang
中科院分区：
文献类型：
--
作者：
Kai-bao Chen;Wei-hua Yang;Shu-yi Wei;Z. Liang
本文给出了用夸克-夸克关联器定义的自旋为1的强子的三维碎裂函数的系统结果。总共有72个这样的碎片函数，其中18个是扭曲-2，36个是扭曲-3，18个是扭曲-4。我们还给出了扭曲3部分与由QCD运动方程得到的夸克-胶子-夸克关联子定义的扭曲3部分之间的关系。我们指出，高能两粒子半包含强子产生过程e+e-→VπX是研究三维张量极化相关碎裂函数的最佳场所之一.我们提出了一般的运动学分析，这一过程，并表明，横截面应表示在81个独立的结构功能。之后，我们提出的强子张量，结构函数，方位角和自旋不对称性的部分子模型的结果，在这些规范不变的碎裂功能的领导阶微扰量子色动力学扭转-3。
We present the systematic results for three-dimensional fragmentation functions of spin-1 hadrons defined via the quark-quark correlator. There are totally 72 such fragmentation functions, among them 18 are twist-2, 36 are twist-3 and 18 are twist-4. We also present the relationships between the twist-3 parts and those defined via the quark-gluon-quark correlator obtained from the QCD equation of motion. We show that the two particle semi-inclusive hadron production process e+e-→VπX at high energies is one of the best places to study the three-dimensional tensor polarization dependent fragmentation functions. We present the general kinematic analysis of this process and show that the cross section should be expressed in terms of 81 independent structure functions. After that we present parton model results for the hadronic tensor, the structure functions, and the azimuthal and spin asymmetries in terms of these gauge invariant fragmentation functions at the leading order perturbative quantum chromodynamics up to twist-3.