标题： 多重性分布和快速度间隙 显示英文标题

标题： Multiplicity Distributions and Rapidity Gaps

摘要： 我研究粒子多重性分布的物理现象，特别强调低多重性，这是研究快度间隙背景的一部分。 特别是，我分析了两个喷注之间的快度区间中的多重性分布，使用了HERWIG QCD模拟并进行了一些必要的修改。 该分布不是负二项式形式，并在零多重性处表现出异常增强。 介绍了一些用于处理多重性分布的有用数学工具。 除了在实验上方便外，忽略pt<0.2的粒子还具有理论上的优势。 显示英文摘要

摘要： I examine the phenomenology of particle multiplicity distributions, with special emphasis on the low multiplicities that are a background in the study of rapidity gaps. In particular, I analyze the multiplicity distribution in a rapidity interval between two jets, using the HERWIG QCD simulation with some necessary modifications. The distribution is not of the negative binomial form, and displays an anomalous enhancement at zero multiplicity. Some useful mathematical tools for working with multiplicity distributions are presented. It is demonstrated that ignoring particles with pt<0.2 has theoretical advantages, in addition to being convenient experimentally.