Início
Agenda 

 25 de fevereiro de 2015
16h30 F210 

Pedro Vieira

Perimeter Institute
for Theoretical Physics


Scattering
Amplitudes as a FluxTube Gas
I
will survey recent progress in the quest for an exact
formulation of gauge theories. I will describe recent progress
in looking for a new description of Quantum Field Theory, based
on socalled Integrability techniques, which bypasses the use of
traditional Feynman diagram perturbative techniques and promises
to greatly improve our understanding of finite coupling quantum
fields. More precisely, we shall propose the first
nonperturbative formulation of planar scattering amplitudes in
a nonabelian Gauge theory (N=4 Super YangMills Theory) or,
equivalently, polygonal Wilson loops. The construction is based
on the Operator Product Expansion approach and introduces a new
decomposition of the Wilson loop in terms of fundamental
building blocks named Pentagon transitions. These transitions
satisfy a simple relation to the worldsheet Smatrix on top of
the so called GubserKlebanovPolyakov vacuum which allows us to
bootstrap them at any value of the coupling. 



