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The cusp anomalous dimension at three loops and beyond

  • Diego Correa
  • Johannes Henn
  • Juan Maldacena
  • Amit Sever
Article

Abstract

We derive an analytic formula at three loops for the cusp anomalous dimension Γcusp(ϕ) in \( \mathcal{N} = {4} \) 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.

Keywords

Wilson ’t Hooft and Polyakov loops Scattering Amplitudes AdS-CFT Cor- respondence 1/N Expansion 

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Copyright information

© SISSA, Trieste, Italy 2012

Authors and Affiliations

  • Diego Correa
    • 1
  • Johannes Henn
    • 2
  • Juan Maldacena
    • 2
  • Amit Sever
    • 2
    • 3
  1. 1.Instituto de Física La PlataUniversidad Nacional de La PlataLa PlataArgentina
  2. 2.School of Natural SciencesInstitute for Advanced StudyPrincetonU.S.A.
  3. 3.Perimeter Institute for Theoretical PhysicsWaterlooCanada

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