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arXiv 0907.3416hep-ph
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在$ep$和$pp$碰撞中用运行耦合修正检验非线性演化

Testing Non-linear Evolution with Running Coupling Corrections in $ep$ and $pp$ collisions

M. A. Betemps, V. P. Goncalves, J. T. de Santana Amaral

摘要:

微扰QCD预言,胶子密度的增长在小- $x$(高能量)应该饱和,形成彩色玻璃凝聚体(CGC),这是在平均场近似的Balitsky-Kovchegov(BK)方程。最近,推导了BK方程的次-首阶修正,并对包含性$ep$ HERA数据进行了全局拟合,从而得到了前向散射振幅的参数化。在本文中,我们比较了这种参数化与其他唯象模型的预测和研究的饱和物理衍射深非弹性电子-质子散射和前向强子产生的$pp$碰撞。我们的结果表明,运行耦合BK解决方案是能够描述这些可观的。

英文摘要:

The perturbative QCD predicts that the growth of the gluon density at small-$x$ (high energies) should saturate, forming a Color Glass Condensate (CGC), which is described in mean field approximation by the Balitsky-Kovchegov (BK) equation. Recently, the next-to-leading order corrections for the BK equation were derived and a global fit of the inclusive $ep$ HERA data was performed, resulting in a parameterization for the forward scattering amplitude. In this paper we compare this parameterization with the predictions of other phenomenological models and investigate the saturation physics in diffractive deep inelastic electron-proton scattering and in the forward hadron production in $pp$ collisions. Our results demonstrate that the running coupling BK solution is able to describe these observables.

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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