旁观者模型中与 T-odd 横向动量相关的胶子碎裂函数

IF 4.3 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Xiupeng Xie, Zhun Lu
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引用次数: 0

摘要

我们提出了一个自旋-1/2 强子的 T-odd 横向动量相关(TMD)胶子碎片函数的模型计算。我们的模型基于这样一种假设:一个时间类壳外胶子可以碎裂成一个强子和一个被认为是壳内的旁观粒子。我们考虑了胶子交换的影响,计算了胶子-胶子相关函数所有必要的一环图。四个一回路图中有两个对碎片函数有相当大的贡献。我们得到了胶子的四个 T-odd TMD 碎片函数的解析表达式。我们还提供了碎片函数的z依赖性和kT依赖性的数值结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
T-odd transverse momentum dependent gluon fragmentation functions in a spectator model

We present a model calculation of the T-odd transverse momentum dependent (TMD) gluon fragmentation functions for a spin-1/2 hadron. Our model is based on the postulation that a time-like off-shell gluon can fragment into a hadron and a single spectator particle, which is considered to be on-shell. We consider the effect of the gluon exchange to calculate all necessary one-loop diagrams for the gluon-gluon correlation functions. Two out of four one-loop diagrams give sizeable contributions to the fragmentation functions. We obtain analytical expressions for the four T-odd TMD fragmentation functions of the gluon. We also provide numerical results on the z-dependence and kT-dependence of the fragmentation functions.

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来源期刊
Physics Letters B
Physics Letters B 物理-物理:综合
CiteScore
9.10
自引率
6.80%
发文量
647
审稿时长
3 months
期刊介绍: Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.
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