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arXiv 0811.2320hep-th
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AdS/CFT Correspondence中具有更高权超共形基色的四点关联函数

Four-point correlators with higher weight superconformal primaries in the AdS/CFT Correspondence

Linda I. Uruchurtu

摘要:

在大t Hooft,大$N$极限下,计算了两个1/2 BPS共形权基元$Δ=2$和两个1/2-BPS共形权基元$Δ=n$的四点关联函数.这些算子与质量为$m^2=-4$和$m^2=n(n-4)$的Kaluza-Klein超引力场$s_k$是对偶的。考虑到现有的计算SO(6)张量乘积和的形式只适用于保形维数小的初等,我们提出了一种基于Dolan和Osborn提出的调和多项式的形式.然后,我们证明了与计算相关的超重力拉格朗日量是sigma模型类型的(即,四阶导数耦合消失),并且连接振幅的最终结果分成自由部分和相互作用部分,如一般情况下所预期的那样。

英文摘要:

The four-point correlation function of two 1/2 BPS primaries of conformal weight $Δ=2$ and two 1/2-BPS primaries of conformal weight $Δ=n$ is calculated in the large 't Hooft, large $N$ limit. These operators are dual to Kaluza-Klein supergravity fields $s_k$ with masses $m^2=-4$ and $m^2=n(n-4)$. Given that the existing formalism for evaluating sums of products of SO(6) tensors that determine the effective couplings is only suitable for primaries with small conformal dimensions, we make us of an alternative formalism based on harmonic polynomials introduced by Dolan and Osborn. We then show that the supergravity lagrangian relevant to the computation is of sigma-model type (i.e., the four-derivative couplings vanish) and that the final result for the connected amplitude splits into a free and an interacting part, as expected on general grounds.

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