The D1/D5 system and singular CFT

Nathan Seiberg, Edward Witten

Research output: Contribution to journalArticlepeer-review

377 Scopus citations


We study the conformai field theory of the D1/D5 system compactified on X (X is T4 or K3). It is described by a sigma model whose target space is the moduli space of instantons on X. For values of the parameters where the branes can separate, the spectrum of dimensions in the conformai field theory exhibits a continuum above a gap. This continuum leads to a pathology of the conformai field theory, which explains a variety of problems in various systems. In particular, we explain the apparent discrepancy between different methods of finding the spectrum of chiral fields at certain points in the moduli space of the system.

Original languageEnglish (US)
Pages (from-to)XXVII-36
JournalJournal of High Energy Physics
Issue number4
StatePublished - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


  • Field Theories in Lower Dimensions
  • Models of Quantum Gravity
  • Superstring Vacua
  • Supersymmetry and Duality


Dive into the research topics of 'The D1/D5 system and singular CFT'. Together they form a unique fingerprint.

Cite this