Abstract

Nekrasov partition function for the supersymmetric gauge theories with general Lie groups is not so far known in a closed form while there is a definition in terms of the integral. In this paper, as an intermediate step to derive it, we give a recursion formula among partition functions, which can be derived from the integral. We apply the method to a toy model which reflects the basic structure of partition functions for BCD type Lie groups and obtained a closed expression for the factor associated with the generalized Young diagram.

Highlights

  • Starting from a seminal work by Seiberg and Witten [1], the connection between supersymmetric gauge theories in 4D and 2D conformal field theories is getting more and more tight

  • They were written as a sum over factors associated with Young diagrams which implied the connection with 2D theories

  • Such correspondence becomes more explicit by the AGT conjecture [4] where the partition function is directly related to the correlation function of Liouville theory

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Summary

Introduction

Starting from a seminal work by Seiberg and Witten [1], the connection between supersymmetric gauge theories in 4D and 2D conformal field theories is getting more and more tight. The first key step in such direction is the explicit derivation of instanton partition function by Nekrasov and others in the omega background [2, 3] They were written as a sum over factors associated with (a set of) Young diagrams which implied the connection with 2D theories. We give a partial answer to these problems. We derive the recursive relation in a similar form and give the explicit form of the residue as a product of factors for generalized Young diagrams. We give some arguments how to fight with other problems by using our strategy

Recursive construction of the Nekrasov partition function
Integral representations of instanton partition function for ABCD
Recursion relation from integral formula
New features for BCD and a simplified integral
Proposed formula
Proof of recursion relation
Discussion
Full Text
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