论文标题
质子中的次数计尺度颜色电荷相关性
Sub-femtometer scale color charge correlations in the proton
论文作者
论文摘要
质子中适中的$ x \ sim 0.1 $的颜色电荷相关性是从其轻锥波函数中提取的。电荷波动远非高斯，它们对冲击参数以及Gluon探针的相对横向动量（或距离）表现出有趣的依赖性。我们为小型$ x $ x $ x $ x $ balitsky-kovchegov提供了带有影响参数的偶极散射幅度的演变，$ \ hat r \ cdot \ hat b $依赖性以及由于三gluon交换而引起的非零$ c $ -odd组件。最后，我们计算（正向）weizsaecker-williams gluon分布，包括线性极化胶的分布，最高为$ a^+$的第四阶。由于四分之一相关器而引起的校正提供了横向动量刻度，$ q> 0.5 $ GEV，用于几乎最大的极化。
Color charge correlations in the proton at moderately small $x\sim 0.1$ are extracted from its light-cone wave function. The charge fluctuations are far from Gaussian and they exhibit interesting dependence on impact parameter and on the relative transverse momentum (or distance) of the gluon probes. We provide initial conditions for small-$x$ Balitsky-Kovchegov evolution of the dipole scattering amplitude with impact parameter and $\hat r \cdot \hat b$ dependence, and with non-zero $C$-odd component due to three-gluon exchange. Lastly, we compute the (forward) Weizsaecker-Williams gluon distributions, including the distribution of linearly polarized gluons, up to fourth order in $A^+$. The correction due to the quartic correlator provides a transverse momentum scale, $q > 0.5$ GeV, for nearly maximal polarization.
