arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0705.2339hep-thhep-ph
收藏

基于非线性实现规范群的质量Yang-Mills理论

A Massive Yang-Mills Theory based on the Nonlinearly Realized Gauge Group

Daniele Bettinelli, Ruggero Ferrari, Andrea Quadri

摘要:

我们提出了一个通过规范群(这里是SU(2))的非线性表示实现的大质量杨-米尔斯理论的减法方案。它基于在进行适当的归一化之后,在维度正则化中减去幅度的D-4中的极点。摄动理论是在循环数和程序是稳定的迭代减去极点。非物理的Goldstone玻色子、Faddeev-Popov鬼和规范场的非物理模在幺正性方程中被抵消。自发对称性破缺参数不是一个物理变量。我们使用已经在非线性西格玛模型中测试过的工具:戈德斯通玻色子腿数的层次结构和弱幂计数性质(每个阶的独立发散振幅的有限数量)。有趣的是,该模型自然地建立在SU(2)_L局域时间SU(2)_R全局对称性的基础上。通过构造,物理振幅依赖于规范粒子的质量和自耦合常数,此外还依赖于辐射修正的标度参数。费曼规则在朗道规范中。

英文摘要:

We propose a subtraction scheme for a massive Yang-Mills theory realized via a nonlinear representation of the gauge group (here SU(2)). It is based on the subtraction of the poles in D-4 of the amplitudes, in dimensional regularization, after a suitable normalization has been performed. Perturbation theory is in the number of loops and the procedure is stable under iterative subtraction of the poles. The unphysical Goldstone bosons, the Faddeev-Popov ghosts and the unphysical mode of the gauge field are expected to cancel out in the unitarity equation. The spontaneous symmetry breaking parameter is not a physical variable. We use the tools already tested in the nonlinear sigma model: hierarchy in the number of Goldstone boson legs and weak power-counting property (finite number of independent divergent amplitudes at each order). It is intriguing that the model is naturally based on the symmetry SU(2)_L local times SU(2)_R global. By construction the physical amplitudes depend on the mass and on the self-coupling constant of the gauge particle and moreover on the scale parameter of the radiative corrections. The Feynman rules are in the Landau gauge.

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。

↑