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arXiv 1406.0179hep-thhep-latmath-phmath.MP
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拉格朗日形式中的有限BRST-antiBRST变换

Finite BRST-antiBRST Transformations in Lagrangian Formalism

Pavel Yu. Moshin, Alexander A. Reshetnyak

摘要:

我们继续研究在[arXiv:1405.0790[hep-th]]中开始的拉格朗日形式主义中的一般规范理论的有限BRST-反BRST变换,其中具有反对易格拉斯曼参数的双峰$λ_{a}$,$a=1,2$,并找到与常数$λ_{a}$的变量变化相对应的显式雅可比。这使得有可能获得沃德身份及其后果的生成功能的格林函数。我们宣布的形式的雅可比[证明是正确的在[arXiv:1406.5086[hep-th]]有限域相关的BRST-反BRST变换与功能相关的参数,$λ_{a}% =s_{a}Λ$,诱导由有限的偶数值功能$Λ(ϕ,π,λ)$和由发电机$s_{a}$的BRST-反BRST变换作用在空间的字段$ϕ$,反字段$ϕ_{a}^{\ast}$,$\bar ϕ$和辅助变量$π^{a},λ$。在此雅可比矩阵的基础上,我们求解了$Λ$的补偿方程,该方程用于实现任意规范理论的规范固定泛函的精确变化。本文导出了一种新的含参数$λ_{a}$的Ward恒等式,并研究了规范依赖性问题。一般的方法是由Freedman-Townsend模型\一个非阿贝尔反对称张量场的例子。

英文摘要:

We continue the study of finite BRST-antiBRST transformations for general gauge theories in Lagrangian formalism initiated in [arXiv:1405.0790[hep-th]], with a doublet $λ_{a}$, $a=1,2$, of anticommuting Grassmann parameters, and find an explicit Jacobian corresponding to this change of variables for constant $λ_{a}$. This makes it possible to derive the Ward identities and their consequences for the generating functional of Green's functions. We announce the form of the Jacobian [proved to be correct in [arXiv:1406.5086[hep-th]] for finite field-dependent BRST-antiBRST transformations with functionally-dependent parameters, $λ_{a}% =s_{a}Λ$, induced by a finite even-valued functional $Λ(ϕ,π,λ)$ and by the generators $s_{a}$ of BRST-antiBRST transformations acting in the space of fields $ϕ$, antifields $ϕ_{a}^{\ast}$, $\bar ϕ$ and auxiliary variables $π^{a},λ$. On the basis of this Jacobian, we solve a compensation equation for $Λ$, which is used to achieve a precise change of the gauge-fixing functional for an arbitrary gauge theory. We derive a new form of the Ward identities containing the parameters $λ_{a}$ and study the problem of gauge-dependence. The general approach is exemplified by the Freedman--Townsend model of\ a non-Abelian antisymmetric tensor 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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