D-branes and dual gauge theories in type 0 strings

Igor R. Klebanov, Arkady A. Tseytlin

Research output: Contribution to journalArticle

182 Scopus citations

Abstract

We consider the type 0 theories, obtained from the closed NSR string by a diagonal GSO projection which excludes space-time fermions, and study the D-branes in these theories. The low-energy dynamics of N coincident D-branes is governed by a U(N) gauge theory coupled to adjoint scalar fields. It is tempting to look for the type 0 string duals of such bosonic gauge theories in the background of the R-R charged p-brane classical solutions. This results in a picture analogous to the one recently proposed by Polyakov (hep-th/9809057). One of the serious problems that needs to be resolved is the closed string tachyon mode which couples to the D-branes and appears to cause an instability. We study the tachyon terms in the type 0 effective action and argue that the background R-R flux provides a positive shift of the (mass)2 of the tachyon. Thus, for sufficiently large flux, the tachyonic instability may be cured, removing the most basic obstacle to constructing the type 0 duals of non-supersymmetric gauge theories. We further find that the tachyon acquires an expectation value in the presence of the R-R flux. This effect is crucial for breaking the conformai invariance in the dual description of the 3 + 1-dimensional non-supersymmetric gauge theory.

Original languageEnglish (US)
Pages (from-to)155-181
Number of pages27
JournalNuclear Physics B
Volume546
Issue number1-2
DOIs
StatePublished - Apr 26 1999

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Keywords

  • Nonsupersymmetric strings
  • Tachyon condensation
  • Yang-Mills theory

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