Quantum Moduli Spaces of $N=1$ String Theories

Details Quantum Moduli Spaces of $N=1$ String Theories Quantum Moduli Spaces of $N=1$ String Theories

1995-08-16

arxiv.org/abs/hep-th/9508071v2

Phys.Rev. D53 (1996) 5790-5798

Physics

High Energy Physics

High Energy Physics - Theory

26 pages; uses harvmac. Footnote re fixing dilaton added

Scientific paper

10.1103/PhysRevD.53.5790

Generically, string models with $N=1$ supersymmetry are not expected to have moduli beyond perturbation theory; stringy non-perturbative effects as well as low energy field-theoretic phenomena such as gluino condensation will lift any flat directions. In this note, we describe models where some subspace of the moduli space survives non-perturbatively. Discrete $R$ symmetries forbid any inherently stringy effects, and dynamical considerations control the field-theoretic effects. The surviving subspace is a space of high symmetry; the system is attracted to this subspace by a potential which we compute. Models of this type may be useful for considerations of duality and raise troubling cosmological questions about string theory. Our considerations also suggest a mechanism for fixing the expectation value of the dilaton.

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