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arXiv 0707.2408hep-th
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关于AdS空间中的程函逼近

On the Eikonal Approximation in AdS Space

Richard C. Brower, Matthew J. Strassler, Chung-I Tan

摘要:

我们探讨了与规范理论中的散射有关的AdS_5空间中引力子交换的程函近似。我们限制自己的制度,共形不变性的对偶规范理论举行,和大的特胡夫特耦合的计算涉及纯引力。我们给出了一个启发式的参数,直接循环计算,和冲击波推导。AdS_3中的标量传播子起着关键作用,表明即使在强耦合下,二维共形不变性也控制着高能四维规范散射。

英文摘要:

We explore the eikonal approximation to graviton exchange in AdS_5 space, as relevant to scattering in gauge theories. We restrict ourselves to the regime where conformal invariance of the dual gauge theory holds, and to large 't Hooft coupling where the computation involves pure gravity. We give a heuristic argument, a direct loop computation, and a shock wave derivation. The scalar propagator in AdS_3 plays a key role, indicating that even at strong coupling, two-dimensional conformal invariance controls high-energy four-dimensional gauge-theory scattering.

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