Gluon scattering amplitudes at strong coupling

被引：638

作者：

Alday, Luis F. ^{[1
]}

Maldacena, Juan

机构：

[1] Univ Utrecht, Inst Theoret Phys, NL-3508 TD Utrecht, Netherlands

[2] Univ Utrecht, Spinoza Inst, NL-3508 TD Utrecht, Netherlands

[3] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2007年 / 06期

关键词：

strong coupling expansion; supersymmetric gauge theory; AdS-CFT correspondence;

D O I：

10.1088/1126-6708/2007/06/064

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We describe how to compute planar gluon scattering amplitudes at strong coupling in N = 4 super Yang Mills by using the gauge/string duality. The computation boils down to finding a certain classical string configuration whose boundary conditions are determined by the gluon momenta. The results are infrared divergent. We introduce the gravity version of dimensional regularization to define finite quanities. The leading and subleading IR divergencies are characterized by two functions of the coupling that we compute at strong coupling. We compute also the full finite form for the four point amplitude and we find agreement with a recent ansatz by Bern, Dixon and Smirnov.

引用

页数：26

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