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arXiv 1002.4575hep-phnucl-th
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高能下QCD分层饱和模型中碰撞参量空间的相关性

Correlations in impact-parameter space in a hierarchical saturation model for QCD at high energy

A. H. Mueller, S. Munier

摘要:

为了估计快强子或快核中物质分布的均匀性,我们计算了在某些特定的饱和模型下,碰撞参量空间中不同点的饱和标度Q_s的相关性。我们发现这些相关性相当强:在尺寸为exp[const*ln^2(1/α_s^2)]/Q_s的区域中,饱和度尺度几乎是均匀的,这意味着胶子密度在该典型尺寸的区域内不应该有显著的波动。我们期望这些结论以及我们得到的相关性的明确的解析表达式在适当的范围内对完全QCD也是正确的。

英文摘要:

In order to get an estimate of the homogeneity of the distribution of matter in a fast hadron or nucleus, we compute the correlations of the saturation scales Q_s between different points in impact-parameter space, in some specific saturation models. We find that these correlations are quite strong: The saturation scale is nearly uniform in domains whose sizes scale like exp[const*ln^2(1/α_s^2)]/Q_s, which means that the density of gluons should not fluctuate significantly over regions of that typical size. We expect these conclusions as well as the explicit analytical expressions we obtain for the correlations to be true also for full QCD in appropriate limits.

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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