Diffeomorphism invariant measure for finite dimensional geometries

Details Diffeomorphism invariant measure for finite dimensional geometries Diffeomorphism invariant measure for finite dimensional geometries

1996-07-09

arxiv.org/abs/hep-th/9607071v1

Nucl.Phys. B488 (1997) 719-734

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, no figures, plain LaTeX file

Scientific paper

10.1016/S0550-3213(97)00017-5

We consider families of geometries of D--dimensional space, described by a finite number of parameters. Starting from the De Witt metric we extract a unique integration measure which turns out to be a geometric invariant, i.e. independent of the gauge fixed metric used for describing the geometries. The measure is also invariant in form under an arbitrary change of parameters describing the geometries. We prove the existence of geometries for which there are no related gauge fixing surfaces orthogonal to the gauge fibers. The additional functional integration on the conformal factor makes the measure independent of the free parameter intervening in the De Witt metric. The determinants appearing in the measure are mathematically well defined even though technically difficult to compute.

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