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arXiv 1407.8458hep-phnucl-th
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高能质子的形状

The shape of the proton at high energies

Soeren Schlichting, Bjoern Schenke

摘要:

我们提出了第一次计算的波动胶子分布的质子作为一个函数的影响参数和快度采用功能朗之万形式的JIMWLK重整化群方程。我们证明了当考虑屏蔽色荷的长程库仑场的禁闭效应时,演化是幺正的。质子的大x结构,以三个价夸克的位置为特征,对质子形状的影响一直持续到x值很小的时候。我们确定了偶极散射振幅作为碰撞参量和偶极尺寸的函数,并提取了饱和标度和质子半径的快度演化。

英文摘要:

We present first calculations of the fluctuating gluon distribution in a proton as a function of impact parameter and rapidity employing the functional Langevin form of the JIMWLK renormalization group equation. We demonstrate that when including effects of confinement by screening the long range Coulomb field of the color charges, the evolution is unitary. The large-x structure of the proton, characterized by the position of three valence quarks, retains an effect on the proton shape down to very small values of x. We determine the dipole scattering amplitude as a function of impact parameter and dipole size and extract the rapidity evolution of the saturation scale and the proton radius.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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