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arXiv 0805.1102hep-th
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关于自由交换2-形式规范理论的(反)BRST不变拉格朗日密度的注记

A note on the (anti-)BRST invariant Lagrangian densities for the free abelian 2-form gauge theory

Saurabh Gupta, R. P. Malik

摘要:

我们证明了先前已知的离壳幂零(s_{(a)b} ^2 = 0)和绝对反交换(s_b s_{ab} + s_{ab} s_b = 0)Becchi-Rouet-Stora-Tyr(BRST)变换(s_b)和反BRST变换(s_{ab})是四维(3 + 1)自由阿贝尔2-形式规范理论,其不通过拉格朗日乘子4D向量场明确地并入非常具体的约束场条件。上述条件是非阿贝尔1-形式规范理论的Curci-Ferrari限制的类似条件,它来自我们目前理论的欧拉-拉格朗日运动方程,并确保了变换s_{(a)b}的绝对反对易性。因此,耦合拉格朗日密度,在我们目前的调查中提出的,美学上更有吸引力,更经济。

英文摘要:

We show that the previously known off-shell nilpotent (s_{(a)b}^2 = 0) and absolutely anticommuting (s_b s_{ab} + s_{ab} s_b = 0) Becchi-Rouet-Stora-Tyutin (BRST) transformations (s_b) and anti-BRST transformations (s_{ab}) are the symmetry transformations of the appropriate Lagrangian densities of a four (3 + 1)-dimensional (4D) free Abelian 2-form gauge theory which do not explicitly incorporate a very specific constrained field condition through a Lagrange multiplier 4D vector field. The above condition, which is the analogue of the Curci-Ferrari restriction of the non-Abelian 1-form gauge theory, emerges from the Euler-Lagrange equations of motion of our present theory and ensures the absolute anticommutativity of the transformations s_{(a)b}. Thus, the coupled Lagrangian densities, proposed in our present investigation, are aesthetically more appealing and more economical.

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