中文摘要：

从光子通过夸克－反夸克非局域流到真空的跃迁振幅∏op出发，利用Lorentz分解将光子光锥波函数gγ3（u，P^2）分离出来．在低能等效理论框架下求出了该波函数的解析表达式，并分析了波函数随着夸克动量份额u变化的行为．同时，得到了正反夸克矢量流与虚光子的耦合常数Gγ（P^2）的表达式．结果表明，不同虚度下的波函数关于变换u→u^-对称（u^-=1-u），并且在端点u=0和u=1时不为零．耦合常数Gγ（P^2）在P^2=0时为零，保证了非局域夸克矢量流与波函数退耦，因此P^2=0时的实光子波函数没有实际的物理效应．

英文摘要：

Starting with the transition amplitude of a photon to the vacuum through the non-local quark-antiquark current, the light-cone photon wave function gγ3 （u,P^2） is singled out from the Lorentz decomposition. Its analytic expression is obtained in the framework of the quantum chromodynamics （QCD） low-energy effective theory, and its behavior and trend with respect to the fraction （u） of the quark momentum are analyzed. The coupling constant, Gy（P^2）, of the quark-antiquark vector current to the vir- tual photon state is also obtained. The wave functions corresponding to different virtuality are symmetric with the transformation u→u^-（u^-=1-u） and they are not zero at the end pointsu=0 and u=1. The real photon wave function according to P^2= 0 has no physical meaning, since the coupling constant Gγ（P^2） vanishes at P^2 =0 which guarantees that the non-local vector quark current is decoupled from the wave function.