From SO/Sp instantons to W-algebra blocks
Christoph Keller (Caltech)
07.07.2011 at 16:00
I will discuss instanton partition functions for N=2 superconformal
Sp(1) and SO(4) gauge theories. They agree with the corresponding U(2)
instanton partitions functions only after a non-trivial mapping of the
microscopic gauge couplings, since the instanton counting involves
different renormalization schemes. I then present an AGT-type
correspondence between such Sp(1)/SO(4) instanton partition functions
and chiral blocks with an underlying W(2,2)-algebra symmetry. I will
also discuss how this relates to trifundamental hypermultiplets and
Sicilian quiver theories. This is based on arXiv:1012.4468 with
L.Hollands and J.Song.
Arnold Sommerfeld Center
Theresienstrasse 37
Room 348/349