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arXiv hep-ph/9811368hep-ph
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小$x$域中的分辨虚光子

Resolved virtual photons in the small $x$ domain

H. Jung, L. Jönsson, H. Küster

摘要:

我们发现,最近关于深度非弹性散射前向喷流产生的结果既不能用基于首阶$α_s$ QCD矩阵元和部分子簇射的模型再现,也不能用次首阶计算再现。前向喷流横截面的测量被认为是对新的小$\xbj$部分子动力学的一种有前途的探测,问题是这些数据是否提供了这一点的指示。同样的问题出现在其他实验数据在深非弹性散射在小$\xbj$,不能描述的深非弹性散射的常规模型。在本文中,已解决的光子过程的影响进行了研究,它已被研究到什么程度,除了正常的深度非弹性散射,包括这样的过程导致与数据一致。它示出了两个DGstrom演化链从硬散射过程中的质子和光子,分别是足以描述的效果,观察到的HERA数据,这已归因于BFKL动力学。

英文摘要:

It has been found that recent results on forward jet production from deep inelastic scattering can neither be reproduced by models which are based on leading order $α_s$ QCD matrix elements and parton showers nor by next-to-leading order calculations. The measurement of forward jet cross sections has been suggested as a promising probe of new small $\xbj$ parton dynamics and the question is whether these data provide an indication of this. The same question arises for other experimental data in deep inelastic scattering at small $\xbj$ which can not be described by conventional models for deep inelastic scattering. In this paper the influence of resolved photon processes has been investigated and it has been studied to what extent the inclusion of such processes in addition to normal deep inelastic scattering leads to agreement with data. It is shown that two DGLAP evolution chains from the hard scattering process towards the proton and the photon, respectively, are sufficient to describe effects, observed in the HERA data, which have been attributed to BFKL dynamics.

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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