通过高多样性看一下强子化

E. Kokoulina, A. Kutov, V. Nikitin, V. Riadovikov, A. Vorobiev
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引用次数: 0

摘要

在用夸克和胶子的语言描述相互作用的QCD中,实验和理论研究了多粒子的产生。实验中记录了真实的强子。从夸克和胶子到观察到的强子的转移使用了各种现象学模型。为了描述高多样性区域,我们建立了胶子优势度模型(GDM)。它代表了两个阶段的卷积。第一阶段被描述为QCD的一部分。对于第二种(强子化),使用现象学模型。为了描述强光化,提出了一种与强光化优势区实验数据相一致的方案。将该模型与e+e-湮灭在较宽能量区间(高达200gev)的数据进行比较,证实了强子化的碎片化机制、夸克-胶子级联随着能量的增加而发展以及韧致胶子的主导作用。GDM内pp碰撞的拓扑截面描述证明了强子碰撞中强子化机制正在被重组机制所取代。此时,胶子在多粒子产生过程中起着主动作用,而价夸克则是被动的。它们停留在主要粒子中,只有胶子分裂负责高多重性区域。包含中间夸克带电拓扑的GDM描述了pp湮灭的拓扑截面,并解释了二次相关动量与平均介子多重率的负值区域随着能量的增加而初始线性增长。提出的强子化方案可以描述多粒子产生的基本过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A look at hadronization via high multiplicity
Multiparticle production is studied experimentally and theoretically in QCD that describes interactions in the language of quarks and gluons. In the experiment the real hadrons are registered. Various phenomenological models are used for transfer from quarks and gluons to observed hadrons. In order to describe the high multiplicity region, we have developed a gluon dominance model (GDM). It represents a convolution of two stages. The first stage is described as a part of QCD. For the second one (hadronization), the phenomenological model is used. To describe hadronization, a scheme has been proposed, consistent with the experimental data in the region of its dominance. Comparison of this model with data on e+e- annihilation over a wide energy interval (up to 200 GeV) has confirmed the fragmentation mechanism of hadronization, the development of the quark-gluon cascade with energy increase and domination of bremsstrahlung gluons. The description of topological cross sections in pp collisions within GDM testifies that in hadron collisions the mechanism of hadronization is being replaced by the recombination one. At that point, gluons play an active role in the multiparticle production process, and valence quarks are passive. They stay in the leading particles, and only the gluon splitting is responsible for the region of high multiplicity. GDM with inclusion of intermediate quark charged topologies describes topological cross sections in pp̅ annihilation and explains initial linear growth in the region of negative values of a secondary correlative momentum vs average pion multiplicity with increasing of energy. The proposed hadronization scheme can describe the basic processes of multiparticle production.
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