Nonabelian D-branes, Open Strings, and Gauge Theory

TL;DR

This paper introduces nonabelian D-branes to clarify differences in open string dynamics and explores their potential for providing new string duals for large N QCD, highlighting novel theoretical insights.

Contribution

It presents the concept of nonabelian D-branes and applies it to propose new string duals for large N QCD, advancing understanding of gauge/string correspondence.

Findings

Nonabelian D-branes distinguish open string dynamics from traditional models.

Potential new string duals for large N QCD are proposed.

The concept explains additional massless scalars in D-brane constructions.

Abstract

There is a subtle difference between the open string dynamics determined by the original dual resonance models and that determined by D-brane constructions within critical closed string theory. For instance, in contrast to the former, the latter have massless scalars in addition to the massless gluon shared by both. We introduce and explain the concept of nonabelian D-branes which illuminates this distinction. We employ this concept to offer new possibilities for string duals for large N QCD (pure Yang-Mills gauge theory).