info:eu-repo/semantics/article
The cusp anomalous dimension at three loops and beyond
Fecha
2012-05Registro en:
Correa, Diego Hernán; Henn, Johannes; Maldacena, Juan; Sever, Amit; The cusp anomalous dimension at three loops and beyond; Springer; Journal of High Energy Physics; 5; 5-2012; 1-30
1126-6708
CONICET Digital
CONICET
Autor
Correa, Diego Hernán
Henn, Johannes
Maldacena, Juan
Sever, Amit
Resumen
We derive an analytic formula at three loops for the cusp anomalous dimension Γ cusp(φ) 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. © 2012 SISSA.