Covariant N ≤ 2 heterotic string in four dimensions

William D. Linch, Brenno Carlini Vallilo

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We construct a covariant formulation of the heterotic superstring on K3 × T2 with manifest N ≤ 2 supersymmetry. We show how projective superspace appears naturally in the hybrid formulation giving a (partially) geometric interpretation of the harmonic parameter. The low-energy effective action for this theory is given by a non-standard form of N ≤ 2 supergravity which is intimately related to the N ≤ 1 old-minimal formulation. This formalism can be used to derive new descriptions of interacting projective superspace field theories using Berkovits' open string field theory and the heterotic Berkovits-Okawa-Zwiebach construction.

Original languageEnglish
Article number082
JournalJournal of High Energy Physics
Issue number3
Publication statusPublished - 1 Mar 2007


  • Conformal field models in string theory
  • Extended supersymmetry
  • Superspaces
  • Superstrings and heterotic strings

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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