论文标题
结构功能测量的Gluon饱和签名
Signatures of gluon saturation from structure-function measurements
论文作者
论文摘要
我们研究了小bjorken可变弹出（DIS）的非线性QCD动力学的实验可观察的信号，该信号是通过量化线性dokshitzer-gribov-lipatov-altarelli-parisi（dglap）进化的线性dokshitzer-gribov-lipatov-altarelli-parisei（dglap）进化的线性dokshitzer-gribov-lipatov-altarelli-parisei（dglap）的线性差异，并与贝尔克斯的进化（BLE），这是通过量化的差异。为了在两个方程式的初始条件下删除参数化自由的效果，我们首先匹配DIS结构功能的预测$ f_2 $和$ f _ {\ rm l} $从$ x，q^2 $中的两个框架中的两个框架中，其中两个框架都应提供对相关物理学的准确描述。然后，当人们远离该匹配区域时，动力学的差异会通过偏差来量化。对于免费的质子，我们发现$ f_2 $的差异保持在几％的水平，而在$ f _ {\ rm l} $中，偏差较大，在eic和$ 40 \，$ 40 \，\％$，\％$，在LHEC KINEMATICS上。有了沉重的核，差异的差异最高为$ 10 \，$ f_2 $中的$ \％$，并且可以分别达到$ f _ {\ rm l} $的$ 20 \，\％$和$ 60 \，\％$，分别为EIC和LHEC。
We study experimentally observable signals for nonlinear QCD dynamics in deep inelastic scattering (DIS) at small Bjorken variable $x$ and moderate virtuality $Q^2$, by quantifying differences between the linear Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution and nonlinear evolution with the Balitsky-Kovchegov (BK) equation. To remove the effect of the parametrization freedom in the initial conditions of both equations, we first match the predictions for the DIS structure functions $F_2$ and $F_{\rm L}$ from both frameworks in a region in $x,Q^2$ where both frameworks should provide an accurate description of the relevant physics. The differences in the dynamics are then quantified by the deviations when one moves away from this matching region. For free protons we find that the differences in $F_2$ remain at a few-percent level, while in $F_{\rm L}$ the deviations are larger, up to $10\,\%$ at the EIC and $40\,\%$ at the LHeC kinematics. With a heavy nucleus the differences are up to $10\,\%$ in $F_2$, and can reach $20\,\%$ and $60\,\%$ in $F_{\rm L}$ for the EIC and the LHeC, respectively.
