arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0710.5698hep-th
收藏

Yang-Mills理论中的广义联络

Extended Connection in Yang-Mills Theory

G. Catren, J. Devoto

摘要:

杨-米尔斯理论的三个基本几何组成部分--规范场、规范固定和鬼场--统一在一个新的对象中:适当选择的主纤维丛中的扩展联络。为此,有必要通过使用规范固定连接而不是截面来推广规范固定的概念。从扩展连接的曲率方程,我们推导出相关的BRST变换,而不施加通常的水平性条件。我们证明了规范场的标准BRST变换仅在局部平凡化中有效,并得到了相应的整体推广。利用Faddeev-Popov方法,将广义规范固定应用于Yang-Mills理论的路径积分量子化.我们表明,建议的规范固定可以使用,即使在存在Gribov的障碍。

英文摘要:

The three fundamental geometric components of Yang-Mills theory -gauge field, gauge fixing and ghost field- are unified in a new object: an extended connection in a properly chosen principal fiber bundle. To do this, it is necessary to generalize the notion of gauge fixing by using a gauge fixing connection instead of a section. From the equations for the extended connection's curvature, we derive the relevant BRST transformations without imposing the usual horizontality conditions. We show that the gauge field's standard BRST transformation is only valid in a local trivialization and we obtain the corresponding global generalization. By using the Faddeev-Popov method, we apply the generalized gauge fixing to the path integral quantization of Yang-Mills theory. We show that the proposed gauge fixing can be used even in the presence of a Gribov's obstruction.

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。

↑