Gauge unification via stable brane recombination

Kang Sin Choi, Jihn E. Kim

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We study the transition between parallel and intersecting branes on a torus. Spontaneous symmetry breaking of nonabelian gauge symmetry is understood as brane separation, and a more general intermediate deformation is discussed. We argue that there exists supersymmetry preserving transition and we can always have parallel branes as a final state. The transition is interpreted due to dynamics of the F- and D-string junctions and their generalization to (F, Dp) bound states. The gauge group and coupling unification is achieved, also as a result of supersymmetry. From the tadpole cancelation condition, we naturally have intersecting brane models as broken phases of type-I theory with SO(32) gauge group.

Original languageEnglish
Pages (from-to)1043-1060
Number of pages18
JournalJournal of High Energy Physics
Issue number11
StatePublished - 2005


  • Compactification and String Models
  • D-branes
  • GUT
  • Superstring Vacua


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