@article {2010,
title = {Hitchin systems, N=2 gauge theories and W-gravity},
journal = {Phys. Lett. B 691 (2010) 111-115},
number = {SISSA;60/2009/EP-FM},
year = {2010},
abstract = {We propose some arguments supporting an M-theory derivation of the duality recently discovered by Alday, Gaiotto and Tachikawa between two-dimensional conformal field theories and N=2 superconformal gauge theories in four dimensions. We find that A_{N-1} Toda field theory is the simplest two-dimensional conformal field theory quantizing the moduli of N M5-branes wrapped on a Riemann surface. This leads us to identify chiral operators of the N=2 gauge theories with W-algebra currents. As a check of this correspondence we study some relevant OPE\\\'s obtaining that Nekrasov\\\'s partition function satisfies W-geometry constraints.},
doi = {10.1016/j.physletb.2010.06.027},
url = {http://hdl.handle.net/1963/3831},
author = {Giulio Bonelli and Alessandro Tanzini}
}