Superstrings with spontaneously broken supersymmetry and their effective theories

Sergio Ferrara, Costas Kounnas, Massimo Porrati, Fabio Zwirner

    Research output: Contribution to journalArticlepeer-review


    We discuss superstring models with spontaneous breaking of N=1, 2 or 4 space-time supersymmetry, via coordinate-dependent compactifications from five to four dimensions. We provide a description of the supersymmetry breaking mechanism in the formulation with complex world-sheet fermions, and we reinterpret it in terms of special deformations of the lorentzian charge lattice. Considering a representative string model with spontaneously broken N=1 supersymmetry and massless chiral fermions, we show that the knowledge of the spectrum of states and of the flat directions completely specifies its low-energy effective lagrangian, which turns out to be a new no-scale supergravity model. We outline the qualitative difference between these models and other scenarios of gaugino (gravitino) condensation or general non-perturbative phenomena.

    Original languageEnglish (US)
    Pages (from-to)75-105
    Number of pages31
    JournalNuclear Physics, Section B
    Issue number1
    StatePublished - May 15 1989

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics


    Dive into the research topics of 'Superstrings with spontaneously broken supersymmetry and their effective theories'. Together they form a unique fingerprint.

    Cite this