Generalized counting rule for hard exclusive processes.
Generalized counting rule for hard exclusive processes.
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DOI：
10.1103/physrevlett.90.241601
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发表时间：
2003-01
影响因子：
8.6
通讯作者：
X. Ji;Jian-ping Ma;F. Yuan
中科院分区：
文献类型：
--
作者：
X. Ji;Jian-ping Ma;F. Yuan
我们导出了一个广义计数规则的硬排斥过程涉及部分子轨道角动量和强子螺旋翻转。首先，我们用一种系统的方法来计算具有n个部分子和轨道角动量投影l（z）的强子光锥波函数的Fock分量。我们证明了波函数振幅psi（n）（x（i），k（i垂直），l（zi））具有1/（k（2）（垂直））[n（+1）]的主导行为|l（z）|+min（n（'）+|l（'）（z）|）]/2-1），其中n（'）和l（'）（z）分别是重整化下混合振幅的部分子数和轨道角动量投影。除广义计数规则外，该结果还可作为强子光锥波函数建模的约束条件。
We derive a generalized counting rule for hard exclusive processes involving parton orbital angular momentum and hadron helicity flip. We start with a systematic way to enumerate the Fock components of a hadronic light-cone wave function with n partons and orbital angular momentum projection l(z). We show that the wave-function amplitude psi(n)(x(i),k(i perpendicular ),l(zi)) has a leading behavior 1/(k(2)( perpendicular ))[n(+|l(z)|+min(n(')+|l(')(z)|)]/2-1) when all parton transverse momenta are uniformly large, where n(') and l(')(z) are the number of partons and orbital angular momentum projection, respectively, of an amplitude that mixes under renormalization. Besides the generalized counting rule, the result can be used as a constraint in modeling the hadronic light-cone wave functions.