Counting exceptional instantons

Year: 2012

DOI: 10.1007/JHEP07(2012)085

We show how to obtain the instanton partition function of N = 2 SYM
with exceptional gauge group EFG using blow-up recursion relations derived by Nakajima
and Yoshioka. We compute the two instanton contribution and match it with the recent
proposal for the superconformal index of rank 2 SCFTs with E_(6,7) global symmetry.