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首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >Factorization of the Q(2) dependence in electroproduction of vector mesons
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Factorization of the Q(2) dependence in electroproduction of vector mesons

机译：矢量介子电产生中Q（2）依赖性的因式分解

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摘要

In a framework for non-perturbative QCD calculation of high energy processes, the amplitudes for photo- and electroproduction of vector mesons are written as integrals of the overlap product of photon and vector meson wave functions, multiplied by the amplitude for the scattering of q (q) over bar dipole pairs off the proton. For sizes of the overlap functions that are smaller than the typical ranges of the interaction of the dipoles with the proton, the amplitudes factorize in the form of integrals, here called overlap strengths, formed only with the overlap of the wave functions times the square of the dipole separation. The integration is extended over the light front coordinates describing the q (q) over bar dipoles. With this result, the overlap strengths contain all Q(2) dependence of the observables. We show the importance of this factorization in the description of the experimental data for all S-wave vector mesons. (C) 2004 Elsevier B.V. All rights reserved.
机译：在高能过程的非扰动QCD计算框架中，矢量介子的光生和电产生的幅度被写为光子和矢量介子波函数的重叠积的积分，乘以q的散射幅度（ q）通过质子离开偶极子对。当重叠函数的大小小于偶极子与质子相互作用的典型范围时，振幅以积分形式分解，这里称为重叠强度，仅由波函数的重叠乘以平方的平方来形成。偶极分离。积分扩展到描述条形偶极子上的q（q）的光前坐标。结果，重叠强度包含了所有Q（2）观测值的相关性。我们在所有S波矢量介子的实验数据的描述中显示了这种分解的重要性。 （C）2004 Elsevier B.V.保留所有权利。

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