Naked Singularities in Four-Dimensional String Backgrounds

Preprint

5 April 1993

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-th/9304013

Abstract

It is shown that gauged nonlinear sigma models can be always deformed by terms proportional to the field strength of the gauge fields (nonminimal gauging). These deformations can be interpreted as perturbations, by marginal operators, of conformal coset models. When applied to the SL(2,R)*SU(2)/[U(1)*U(1)] WZWN model, a large class of four-dimensional curved spacetime backgrounds are obtained. In particular, a naked singularity may form at a time when the volume of the universe is different from zero.

Keywords

DIMENSIONAL STRING
STRING BACKGROUNDS
NAKED SINGULARITY
FOUR DIMENSIONAL
GAUGED NONLINEAR
NONLINEAR SIGMA
SIGMA MODELS
SINGULARITY
DEFORMED

All Related Versions

Version 1, 1993-04-05, ArXiv
Published version: Physical Review D, 48 (8), 3784.

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