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arXiv 0908.0495hep-ph
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强子碰撞中的多重部分子相互作用和衍射

Multiple Parton Interactions in Hadron Collisions and Diffraction

Paolo Lipari, Maurizio Lusignoli

摘要:

强子是由夸克和胶子组成的复合物体,在碰撞过程中,成分之间可以有几种基本的相互作用。这些基本的相互作用,使用适当的理论框架,可以与总的和弹性的截面。在高C. M。能量,也变得有可能在实验上识别部分子相互作用的高PT子集,并研究它们的多重性分布。多重相互作用速率的预测是困难的,因为原则上需要具有相关的部分子分布函数的知识,所述相关的部分子分布函数描述在相空间的不同元素中同时发现不同部分子的概率。在这项工作中,我们解决这个问题,并提出了一种方法来有效地描述碰撞强子的瞬时配置的波动。这个问题与非弹性衍射过程的起源密切相关。我们提出了一种新的方法,包括衍射截面的程函形式主义,是相当于一个多通道程函。我们与数据进行比较,并提出了一个外推到更高的能量。

英文摘要:

Hadrons are composite objects made of quarks and gluons, and during a collision one can have several elementary interactions between the constituents. These elementary interactions, using an appropriate theoretical framework, can be related to the total and elastic cross sections. At high c.m. energy it also becomes possible to identify experimentally a high pt subset of the parton interactions and to study their multiplicity distribution. Predictions of the multiple interactions rates are difficult because in principle one needs to have a knowledge of the correlated Parton Distribution Functions that describe the probability to find simultaneously different partons in different elements of phase space. In this work we address this question and suggest a method to describe effectively the fluctuations in the instantaneous configuration of a colliding hadron. This problem is intimately related to the origin of the inelastic diffractive processes. We present a new method to include the diffractive cross section in an eikonal formalism that is equivalent to a multi-channel eikonal. We compare with data and present an extrapolation to higher energy.

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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