论文标题
纵向结构函数$ f_l $在低$ q^2 $和低$ x $带有型号的较高扭曲：更新
Longitudinal structure function $F_L$ at low $Q^2$ and low $x$ with model for higher twist: an update
论文作者
论文摘要
鉴于EIC的出现，对纵向结构功能的模型进行了重新分析。该模型基于适当推断到低$ Q^2 $区域的光子 - 聚光融合机制。它包括$ q^2 \ rightarrow $ 0的运动学约束$ f_l \ sim q^4 $和更高的扭曲贡献，它消失为$ q^2 \ rightarrow \ rightarrow \ infty $。修订的模型进行了严重更新，并将其与当前可用的数据进行了比较。
A reanalysis of the model for the longitudinal structure function $F_L (x,Q^2)$ at low $x$ and low $Q^2$ was undertaken, in view of the advent of the EIC. The model is based on the photon-gluon fusion mechanism suitably extrapolated to the region of low $Q^2$. It includes the kinematic constraint $F_L\sim Q^4$ as $Q^2\rightarrow$ 0 and higher twist contribution which vanishes as $Q^2 \rightarrow \infty$. Revised model was critically updated and compared to the presently available data.
