Alex Buchel and Johannes Walcher JHEP05(2003)069 doi:10.1088/1126-6708/2003/05/069
Alex Buchel1 and Johannes Walcher2
Show affiliationsThis 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) × SO(8−p,1) symmetry, for general brane dimensionality p and homogeneous brane distribution in transverse space ρ⊥. A simple application of singularity theorems shows that (for p ≤ 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.
E-print Number: hep-th/0305055
Cited: by |
Refers: to
11.25.Wx String and brane phenomenology
14.80.-j Other particles (including hypothetical)
11.27.+d Extended classical solutions; cosmic strings, domain walls, texture
Issue 05 (May 2003)
Received 15 May 2003, accepted for publication 28 May 2003
Published 3 June 2003
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