arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.17399hep-th
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WZW模型的广义超引力方程

Generalized Supergravity Equations for the WZW Model

Ali Eghbali, Simin Ghasemi-Sorkhabi, Adel Rezaei-Aghdam

AI总结:

本研究推导李群上WZW模型的广义超引力方程(GSEs),通过简化条件与类光广义Killing向量假设求解,成功得到五维及以下部分李群的解,另两个群因无类光向量不支持GSEs。

摘要:

广义超引力方程(GSEs)最初是作为标准IIB超引力方程的修正提出的,旨在满足Arutyunov等人引入的η-形变AdS₅×S⁵背景。本研究基于李群推导Wess-Zumino-Witten(WZW)模型的GSEs。首先,通过施加单圈β函数方程为零的条件简化WZW模型的GSEs;接着,引入Killing向量场I的假设(Ansatz),证明Killing方程ℒ_I G_μν=0成立;此外,引入广义Killing向量,指出GSEs存在解要求该向量为类光。据此,我们求解了维度不超过五的李群上构建的WZW模型的简化GSEs,但遗憾的是,其中两个群不存在类光向量,因此不允许GSEs。

英文摘要:

Generalized supergravity equations (GSEs) were originally proposed as a modification of the standard IIB supergravity equations to satisfy the background of $η$-deformed $AdS_5 \times S^5$ introduced by Arutyunov {\it et al}. In this study, we proceed to write down the GSEs for the Wess-Zumino-Witten (WZW) models based on Lie groups. First, we simplify the GSEs for the WZW model by imposing the conditions for vanishing of the one-loop beta function equations. Then, by introducing an {\it Ansatz} for the Killing vector field $I$, it is shown that the Killing equation ${\cal L}_{_{I}} G_{_{μν}}=0$ is held. In addition, we introduce a generalized Killing vector such that the existence of a solution to the GSEs requires that this vector be light-like. In this way, we solve the simplified GSEs for the WZW models constructed on Lie groups up to dimension five. Unfortunately, two of the groups do not have light-like vectors and therefore do not admit the GSEs.

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