Semi-classical stability of supergravity vacua

Details Semi-classical stability of supergravity vacua Semi-classical stability of supergravity vacua

1996-09-30

arxiv.org/abs/hep-th/9609234v1

Phys.Rev.D55:4822-4838,1997

Physics

High Energy Physics

High Energy Physics - Theory

41 pages, LaTeX

Scientific paper

10.1103/PhysRevD.55.4822

The existence of instantonic decay modes would indicate a semi-classical instability of the vacua of ten and eleven dimensional supergravity theories. Decay modes whose spin structures are incompatible with those of supersymmetric vacua have previously been constructed, and we present generalisations including those involving non trivial dilaton and antisymmetric tensor fields. We then show that the requirement that any instanton describing supersymmetric vacuum decay should admit both a zero momentum hypersurface from which we describe the subsequent Lorentzian evolution and a spin structure at infinity compatible with the putative vacuum excludes all such decay modes, except those with unphysical energy momentum tensors which violate the dominant energy condition.

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