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arXiv 0705.1693hep-th
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带拓扑项的广义1+1维非线性西格玛模型的BRST不变量理论

BRST Invariant Theory Of A Generalized 1+1 Dimensional Nonlinear Sigma Model With Topological Term

Yong-Chang Huang, Kai-Hua Yang, Xi-Guo Lee

摘要:

给出了具有辅助约束、不同Lagrange乘子场和拓扑项的1+1维O(3)非线性西格玛模型的广义Lagrange密度,找到了一个丢失的内约束条件,将辅助约束转化为非线性西格玛模型的内约束,给出了不引入丢失约束的例子,并与引入丢失约束的例子进行了比较,我们得到,当不引入丢失约束时,必须获得许多各种非内在约束。进一步推导了规范生成元,给出了一般条件下模型的一般BRST变换。发现了一般O(3)非线性西格玛模型中存在一个源于BRST变换自由度的规范参数,并得到了鬼场的一般对易关系.

英文摘要:

We give a generalized Lagrangian density of 1+1 Dimensional O(3) nonlinear sigma model with subsidiary constraints, different Lagrange multiplier fields and topological term, find a lost intrinsic constraint condition, convert the subsidiary constraints into inner constraints in the nonlinear sigma model, give the example of not introducing the lost constraint, by comparing the example with the case of introducing the lost constraint, we obtain that when not introducing the lost constraint, one has to obtain a lot of various non-intrinsic constraints. We further deduce the gauge generator, give general BRST transformation of the model under the general conditions. It is discovered that there exists a gauge parameter originating from the freedom degree of BRST transformation in a general O(3) nonlinear sigma model, and we gain the general commutation relations of ghost field.

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。

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