TL;DR
This paper demonstrates how to derive instanton effects in four-dimensional gauge theories through string scattering amplitudes in D3/D(-1) brane systems, linking disk amplitudes to classical instanton solutions.
Contribution
It introduces a method to compute gauge theory instantons using string theory techniques, specifically through disk amplitudes in D3/D(-1) brane configurations.
Findings
Disk amplitudes with mixed boundary conditions source classical instanton solutions.
The approach connects string scattering computations to gauge theory non-perturbative effects.
Provides a framework for studying instantons via open string dynamics.
Abstract
In this contribution we describe how to obtain instanton effects in four dimensional gauge theories by computing string scattering amplitudes in D3/D(-1) brane systems. In particular we show that the disks with mixed boundary conditions, which are typical of the D3/D(-1) system, are the sources for the classical instanton solution.
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