arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0910.4855hep-ph
收藏

胶子有多少自由度?

How Many Degrees of Freedom Has the Gluon ?

Vincent Mathieu

摘要:

在成分模型中,胶球被描述为有效胶子的束缚态。动力学质量的产生导致胶子质量不违反规范不变性。然后,我们可以考虑这些有效的大质量胶子的三个自由度。然而,只有两个自由度的模型被证明是在更好的协议与晶格胶球谱。我回顾了两个模型和三个胶子模型,并解释了为什么即使胶子获得了质量,它的行为就像一个只有两个自由度的无质量粒子。

英文摘要:

In constituent models, glueballs are described as bound states of effective gluons. The dynamical mass generation lead to a gluon mass without violating gauge invariance. One can then consider three degrees of freedom for those effective massive gluons. However, models with only two degrees of freedom are shown to be in better agreement with the lattice glueball spectrum. I review both models for two- and three-gluon models and explain why even though the gluon gains a mass, it behaves as a massless particle with only two degrees of freedom.

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。

↑