Recombination of Intersecting D-branes by Local Tachyon Condensation

TL;DR

This paper models the recombination of intersecting D-branes through super Yang-Mills theory, demonstrating tachyon condensation at intersections, confirming Sen's conjecture, and analyzing decay widths of separated D-branes.

Contribution

It provides a low energy super Yang-Mills description of D-brane recombination via tachyon condensation, supporting Sen's conjecture within this framework.

Findings

Recombination occurs through localized tachyon condensation.

Recombination process aligns with brane-antibrane annihilation.

Decay widths of separated D-branes are discussed.

Abstract

We provide a simple low energy description of recombination of intersecting D-branes using super Yang-Mills theory. The recombination is realized by condensation of an off-diagonal tachyonic fluctuation localized at the intersecting point. The recombination process is equivalent to brane-antibrane annihilation, thus our result confirms Sen's conjecture on tachyon condensation, although we work in the super Yang-Mills theory whose energy scale is much lower than alpha'. We also discuss the decay width of non-parallelly separated D-branes.