Gluon scattering in ${\cal N}=4$ Super Yang-Mills at finite temperature

Details Gluon scattering in ${\cal N}=4$ Super Yang-Mills at finite temperature Gluon scattering in ${\cal N}=4$ Super Yang-Mills at finite temperature

2007-11-22

arxiv.org/abs/0711.3532v2

Prog.Theor.Phys.120:99-128,2008

Physics

High Energy Physics

High Energy Physics - Theory

33 pages, 9 figures; clarifications of some points added, reference added

Scientific paper

10.1143/PTP.120.99

We extend the AdS/CFT prescription of Alday and Maldacena to finite temperature $T$, defining the amplitude for gluon scattering in ${\cal N}=4$ Super Yang-Mills at strong coupling from string theory. It is defined by a lightlike ''Wilson loop'' living at the horizon of the T-dual to the black hole in AdS space. Unlike the zero temperature case, this is different from the Wilson loop contour defined at the boundary of the AdS black hole metric, thus at finite $T$ there is no relation between gluon scattering amplitudes and the Wilson loop. We calculate the amplitude at strong coupling for forward scattering of a low energy gluon ($E

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