矢量介子电产生的纵向截面
The longitudinal cross section of vector meson electroproduction
AI总结：
本文在手袋方法框架下，结合修正微扰方法和Gaussian波函数，计算了轻矢量介子电产生的纵向截面，结果与HERA和HERMES实验数据相当吻合。
AI中文摘要：
我们在手袋方法中分析了小Bjorken-x下轻矢量介子（V=ρ、φ和ω）的电产生，该过程因子化为广义部分子分布和部分子子过程。后者在修正的微扰方法中计算，其中保留了形成矢量介子的夸克和反夸克的横向动量，并考虑了Sudakov抑制。通过双分布对广义部分子分布进行建模，并使用简单的Gaussian波函数描述矢量介子，我们计算了大光子虚度下的纵向截面。结果与最近在HERA和HERMES进行的实验发现相当一致。
英文摘要：
We analyze electroproduction of light vector mesons (V=rho, phi and omega) at small Bjorken-x in the handbag approach in which the process factorizes into general parton distributions and partonic subprocesses. The latter are calculated in the modified perturbative approach where the transverse momenta of the quark and antiquark forming the vector meson are retained and Sudakov suppressions are taken into account. Modeling the generalized parton distributions through double distributions and using simple Gaussian wavefunctions for the vector mesons, we compute the longitudinal cross sections at large photon virtualities. The results are in fair agreement with the findings of recent experiments performed at HERA and HERMES.
