arXiv 1302.64622013-02hep-phnucl-th

组分夸克模型中的双部分子关联

Double parton correlations in constituent quark models

M. Rinaldi, S. Scopetta, V. Vento

备注：: 16 pages, 7 figures; references added; a figure added; conclusions unchanged. Final version accepted for publication in Phys. Rev. D
DOI：: 10.1103/PhysRevD.87.114021

摘要：

在组分夸克模型中，研究了价夸克区的双部分子关联对高能强子-强子碰撞中双部分子散射过程的影响。在这个框架中，两个粒子的相关性是存在的，没有任何额外的规定，在不同的情况下，例如，在独立的粒子模型，如麻省理工学院的袋模型在其最简单的版本。从目前的分析中，可以得出类似的结论，最近得到的一个修改版本的袋模型：相关的纵向动量的活动夸克被发现是相当大的，而那些在横向动量小得多。然而，所使用的框架可以清楚地理解的相关性的动力学起源。特别是，研究表明，横向动量相关性的小尺寸是一个依赖于模型的结果，如果使用具有相当大的夸克轨道角动量的模型来描述质子，则不会发生这种情况。因此，我们的分析允许澄清的动力学起源的双重部分子的相关性，并建立，其中的功能的结果，是模型无关的。实验测试的可能性研究的影响进行了讨论。

英文摘要：

Double parton correlations, having effects on the double parton scattering processes occurring in high-energy hadron-hadron collisions, for example at the LHC, are studied in the valence quark region, within constituent quark models. In this framework, two particle correlations are present without any additional prescription, at variance with what happens, for example, in independent particle models, such as the MIT bag model in its simplest version. From the present analysis, conclusions similar to the ones obtained recenty in a modified version of the bag model can be drawn: correlations in the longitudinal momenta of the active quarks are found to be sizable, while those in transverse momentum are much smaller. However, the used framework allows to understand clearly the dynamical origin of the correlations. In particular, it is shown that the small size of the correlations in transverse momentum is a model dependent result, which would not occur if models with sizable quark orbital angular momentum were used to describe the proton. Our analysis permits therefore to clarify the dynamical origin of the double parton correlations and to establish which, among the features of the results, are model independent. The possibility to test experimentally the studied effects is discussed.

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。

摘要：

英文摘要：

相关论文