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arXiv 0802.1656hep-ph
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弹-靶多次散射和部分子饱和的恢复

Resummation of projectile-target multiple scatterings and parton saturation

S. Munier, F. Schwennsen

摘要:

在一个具有高能极限QCD主要特征的玩具模型的框架下,我们对部分子分裂和投射-靶多重相互作用所构造的散射振幅进行了数值研究,在入射态波函数中没有显式饱和的情况下对振幅进行了归一化.该计算以两种不同的方式执行。这些配方之一,最接近场论,涉及到数值remodification的阶乘发散系列,我们开发适当的数值工具。我们准确地比较所得到的振幅的属性与预期的,如果饱和显式地包括在状态的演变。我们观察到,振幅具有类似的属性在一个小的,但有限的范围内的快速在开始的演变,如预期的。反应扩散过程的某些特征已经存在于该范围内,即使在模型中不考虑饱和时也是如此。

英文摘要:

In the framework of a toy model which possesses the main features of QCD in the high energy limit, we conduct a numerical study of scattering amplitudes constructed from parton splittings and projectile-target multiple interactions, in a way that unitarizes the amplitudes without however explicit saturation in the wavefunction of the incoming states. This calculation is performed in two different ways. One of these formulations, the closest to field theory, involves the numerical resummation of a factorially divergent series, for which we develop appropriate numerical tools. We accurately compare the properties of the resulting amplitudes with what would be expected if saturation were explicitly included in the evolution of the states. We observe that the amplitudes have similar properties in a small but finite range of rapidity in the beginning of the evolution, as expected. Some of the features of reaction-diffusion processes are already present in that range, even when saturation is left out of the model.

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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