Non(anti)commutative N=2 Supersymmetric Gauge Theory from Superstrings in the Graviphoton Background

TL;DR

This paper derives a non(anti)commutative N=2 supersymmetric gauge theory from superstring theory with a graviphoton background, connecting string amplitudes to deformed superspace gauge theories.

Contribution

It demonstrates how a graviphoton background in superstring theory induces a non(anti)commutative deformation of N=2 supersymmetric gauge theories, establishing a direct link between string backgrounds and superspace deformations.

Findings

Deformed Lagrangian matches N=2 supersymmetric U(N) gauge theory in non(anti)commutative superspace.

Disk amplitudes computed in superstring theory reproduce the gauge theory deformation.

Consistency shown with N=2 harmonic superspace deformations.

Abstract

We study open string amplitudes with the D3-branes in type IIB superstring theory compactified on C^2/Z_2. We introduce constant graviphoton background along the branes and calculate disk amplitudes using the NSR formalism. We take the zero slope limit and investigate the effective Lagrangian on the D3-branes deformed by the graviphoton background. We find that the deformed Lagrangian agrees with that of N=2 supersymmetric U(N) gauge theory defined in non(anti)commutative N=1 superspace by choosing appropriate graviphoton background. It is also shown that abelian gauge theory defined in N=2 harmonic superspace with specific non-singlet deformation is consistent with the deformed theory.