Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-10-04
JHEP 0711:068,2007
Physics
High Energy Physics
High Energy Physics - Theory
27 pages, 9 figures,v3:minor corrections
Scientific paper
10.1088/1126-6708/2007/11/068
In this article we consider n gluon color ordered, planar amplitudes in N=4 super Yang Mills at strong 't Hooft coupling. These amplitudes are approximated by classical surfaces in AdS_5 space. We compute the value of the amplitude for a particular kinematic configuration for a large number of gluons and find that the result disagrees with a recent guess for the exact value of the amplitude. Our results are still compatible with a possible relation between amplitudes and Wilson loops. In addition, we also give a prescription for computing processes involving local operators and asymptotic states with a fixed number of gluons. As a byproduct, we also obtain a string theory prescription for computing the dual of the ordinary Wilson loop, Tr P exp[ i\oint A ], with no couplings to the scalars. We also evaluate the quark-antiquark potential at two loops.
Alday Luis F.
Maldacena Juan
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