A D = 4 N = 1 orbifold of type I strings

Micha Berkooz, Robert G. Leigh

Research output: Contribution to journalArticlepeer-review


We consider the propagation of type I open superstrings on orbifolds with four non-compact dimensions and N = 1 supersymmetry. In this paper, we concentrate on a non-trivial ℤ2 × ℤ2 example. We show that consistency conditions, arising from tadpole cancellation and algebraic sources, require the existence of three sets of Dirichlet 5-branes. We discuss fully the enhancements of the spectrum when these 5-branes intersect. An amusing attribute of these models is the importance of the tree-level (in type I language) superpotential to the consistent relationship between Higgsing and the motions of 5-branes.

Original languageEnglish (US)
Pages (from-to)187-208
Number of pages22
JournalNuclear Physics B
Issue number1-2
StatePublished - Jan 6 1997
Externally publishedYes


  • D-branes
  • Four dimensions
  • Open strings
  • Supersymmetry

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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