Prof. Dr. Lance Dixon (SLAC)
 https://www.physik.huberlin.de/en/lgt/seminars/qftcolloquium/events/ws2018/20190108
 Prof. Dr. Lance Dixon (SLAC)
 20190108T15:15:00+01:00
 20190108T16:15:00+01:00
 Bootstrapping Amplitudes in Planar N=4 SuperYangMills Theory
What 


When  Jan 08, 2019 from 03:15 to 04:15 (Europe/Berlin / UTC100) iCal 
Where  Hörsaals 0'110, Erwin Schrödinger Zentrum, Rudower Chaussee 26, 12489 Berlin 
Bootstrapping Amplitudes in Planar N=4 SuperYangMills Theory
PS: Notice the unusual location
In the planar limit of a large number of colors, N=4 super YangMills theory is integrable, and remarkable advances have been made in determining operator anomalous dimensions and more to all loop orders. In this talk I'll describe recent progress in constructing scattering amplitudes in this theory to high loop order. Planar N=4 amplitudes are dual to lightlike polygonal Wilsonloops, and are only nontrivial for six or more gluons. The spaces of functions to which the amplitudes belong are so restrictive that only a few constraints are needed to simply write down the answer, through seven loops in the sixgluon case and four loops in the sevengluon case. The results are multivariate functions of the kinematics, which can be analyzed in various limits in order to study how high loop order amplitudes factorize. One can also extrapolate from weak to strong coupling, and compare with the AdS/CFT dual description available there.
Coffee and cookies will be offered half an hour before the start of the colloquium.