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29 March 2024
 
  » arxiv » hep-th/0305055

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Comments on Supergravity Description of S-branes
Alex Buchel ; Johannes Walcher ;
Date 7 May 2003
Journal JHEP 0305 (2003) 069
Subject hep-th
AbstractThis is a note on the coupled supergravity-tachyon matter system, which has been earlier proposed as a candidate for the effective space-time description of S-branes. In particular, we study an ansatz with the maximal ISO(p+1)xSO(8-p,1) symmetry, for general brane dimensionality p and homogeneous brane distribution in transverse space ho_perp. A simple application of singularity theorems shows that (for p le 7) the most general solution with these symmetries is always singular. (This invalidates a recent claim in the literature.) We include a few general comments about the possibility of describing the decay of unstable D-branes in purely gravitational terms.
Source arXiv, hep-th/0305055
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