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arXiv 0810.2768hep-th
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AdS3 WZNW模型中的融合规则和四点函数

Fusion rules and four-point functions in the AdS3 WZNW model

Walter H. Baron, Carmen A. Núñez

摘要:

研究了AdS $_3$ WZNW模型中算子乘积的展开.通过对H $_3^+$ WZNW模式中的表达式进行解析延拓,并加入谱流,计算了一次场及其谱流图像的OPE。我们认为,仿射代数的对称性需要截断建立封闭的希尔伯特空间上的融合规则的理论。虽然物理机制决定的去耦是不完全理解,我们提出了几个一致性检查的结果。因子分解的初步分析允许获得一些属性的四点函数涉及领域的理论的一般部门,以验证他们同意的频谱流选择规则,并表明截断必须实现物理振幅的一致性。

英文摘要:

We study the operator product expansion in the AdS$_3$ WZNW model. The OPE of primary fields and their spectral flow images is computed from the analytic continuation of the expressions in the H$_3^+$ WZNW model, adding spectral flow. We argue that the symmetries of the affine algebra require a truncation which establishes the closure of the fusion rules on the Hilbert space of the theory. Although the physical mechanism determining the decoupling is not completely understood, we present several consistency checks on the results. A preliminary analysis of factorization allows to obtain some properties of four-point functions involving fields in generic sectors of the theory, to verify that they agree with the spectral flow selection rules and to show that the truncation must be realized in physical amplitudes for consistency.

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