The effective action and geometry of closed N = 2 strings

Dan Glück*, Yaron Oz, Tadakatsu Sakai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


N = 2 closed strings have been recently divided in [3] to two T-dual families denoted by α and β. In (2,2) signature both families have one scalar in the spectrum. The scalar in the β-string is known to be a deformation of the target space Kähler potential and the dynamics is that of self-dual gravity. In this paper we compute the effective action of the scalar in the α-string. The scalar is a deformation of a potential that determines the metric, torsion and dilaton. The scalar is free and the dynamics is that of a self-dual curvature with torsion. The result is in agreement with a σ-model computation of Hull.

Original languageEnglish
Pages (from-to)175-187
Number of pages13
JournalJournal of High Energy Physics
Issue number7
StatePublished - 1 Jul 2003


  • Extended Supersymmetry
  • Superstrings and Heterotic Strings


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