An exact formula for the radiation of a moving quark in N=4 super Yang-Millls

DIEGO H. CORREA; JOHANNES HENN; JUAN M. MALDACENA; AMIT SEVER

JOURNAL OF HIGH ENERGY PHYSICS

SPRINGER

Lugar: Trieste; Año: 2012 vol. 06 p. 1 - 20

1126-6708

We derive an exact formula for the cusp anomalous dimension at small angles. This is done by relating the latter to the computation of certain 1/8 BPS Wilson loops which was performed by supersymmetric localization. This function of the coupling also determines the power emitted by a moving quark in N = 4 super Yang Mills, as well as the coecient of the two point function of the displacement operator on the Wilson loop. By similar method we compute the near BPS expansion of the generalized cusp anomalous dimension