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arXiv 1012.3210hep-th
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精确超共形R-对称化Z

The Exact Superconformal R-Symmetry Extremizes Z

Daniel L. Jafferis

摘要:

利用定域法计算了具有四个超荷和一个R对称性的三维理论的三球配分函数Z,得到了规范群在Cartan上的矩阵积分。有一个家庭的耦合到弯曲的背景,参数化的选择R-电荷,使超对称性被保存; Z是这些参数的函数。结果的幅度被证明是极端化的红外共形场论的超共形R-电荷,在没有混合的R-对称性与偶然的对称性。这正好决定了IR超共形R-荷。

英文摘要:

The three sphere partition function, Z, of three dimensional theories with four supercharges and an R-symmetry is computed using localization, resulting in a matrix integral over the Cartan of the gauge group. There is a family of couplings to the curved background, parameterized by a choice of R-charge, such that supersymmetry is preserved; Z is a function of those parameters. The magnitude of the result is shown to be extremized for the superconformal R-charge of the infrared conformal field theory, in the absence of mixing of the R-symmetry with accidental symmetries. This exactly determines the IR superconformal R-charge.

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