The cusp anomalous dimension at three loops and beyond

被引：89

作者：

Correa, Diego ^{[1
]}

Henn, Johannes ^{[2
]}

Maldacena, Juan ^{[2
]}

Sever, Amit ^{[2
,3
]}

机构：

[1] Univ Nacl La Plata, Inst Fis La Plata, RA-1900 La Plata, Argentina

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

[3] Perimeter Inst Theoret Phys, Waterloo, ON N2J 2W9, Canada

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Wilson; 't Hooft and Polyakov loops; Scattering Amplitudes; AdS-CFT Correspondence; 1/N Expansion; WILSON LOOPS; RENORMALIZATION; ASYMPTOTICS;

D O I：

10.1007/JHEP05(2012)098

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 derive an analytic formula at three loops for the cusp anomalous dimension Gamma(cusp)(phi) in N = 4 super Yang-Mills. This is done by exploiting the relation of the latter to the Regge limit of massive amplitudes. We comment on the corresponding three loops quark anti-quark potential. Our result also determines a considerable part of the three-loop cusp anomalous dimension in QCD. Finally, we consider a limit in which only ladder diagrams contribute to physical observables. In that limit, a precise agreement with strong coupling is observed.

引用

页数：30

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