对部分子碎裂为质子的碎裂函数的研究

doi:10.3969/j.issn.1000-5641.2019.02.011

华东师范大学学报(自然科学版) ›› 2019, Vol. 2019 ›› Issue (2): 106-115.doi: 10.3969/j.issn.1000-5641.2019.02.011

对部分子碎裂为质子的碎裂函数的研究

李培育, 阮建红

华东师范大学物理与材料科学学院, 上海 200241

收稿日期:2018-01-16 出版日期:2019-03-25 发布日期:2019-03-27
通讯作者: 阮建红,女,教授,硕士生导师,研究方向为粒子物理.E-mail:jhruan@phy.ecnu.edu.cn E-mail:jhruan@phy.ecnu.edu.cn
作者简介:李培育,女,硕士研究生,研究方向为粒子物理.E-mail:2324861291@qq.com.

Research on parton fragmentation functions of protons

LI Pei-yu, RUAN Jian-hong

School of Physics and Materials Science, East China Normal University, Shanghai 200241, China

Received:2018-01-16 Online:2019-03-25 Published:2019-03-27

摘要/Abstract

摘要： 部分子的分布函数和碎裂函数是研究和分析高能物理实验的重要基础.对质子的价夸克分布函数q（x）和价夸克碎裂为质子的碎裂函数D（x）的关系进行了分析，发现D（x）=（1/6）q（x）可以很好地将它们联系起来.因此，可以通过比较成熟的质子的部分子分布函数来构建部分子碎裂为质子的碎裂函数.利用此关系，建立了一组新的碎裂函数的参数式，计算了相应的微分散射截面并与实验进行了比较.此工作可以确定价夸克碎裂为质子的碎裂函数，以减少拟合部分子碎裂函数时的不确定性.

关键词: 分布函数, 碎裂函数, 结构函数, 湮灭

Abstract: Parton distribution functions and fragmentation functions are fundamental to analyzing high energy experiments.The relationship between the proton valence quark distribution function q(x) and fragmentation function D(x) is analyzed. We find that the simple function D(x)=(1/6)q(x) for a valence quark is a good approximation to describe the available data. We set up a group of new parameterizations of fragmentation functions for protons. Differential cross section data were calculated and compared with recent research. We hope that our work can diminish uncertainties when fitting parton fragmentation functions of protons.

Key words: distribution function, fragmentation function, structure function, annihilation

中图分类号:

O413.4

李培育, 阮建红. 对部分子碎裂为质子的碎裂函数的研究[J]. 华东师范大学学报(自然科学版), 2019, 2019(2): 106-115.

LI Pei-yu, RUAN Jian-hong. Research on parton fragmentation functions of protons[J]. Journal of East China Normal University(Natural Sc, 2019, 2019(2): 106-115.

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对部分子碎裂为质子的碎裂函数的研究

Research on parton fragmentation functions of protons

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