Comments on supergravity description of S-branes
Buchel, Alexander; Walcher, Johannes
Buchel, Alex; Walcher, Johannes (2003). "Comments on supergravity description of S-branes." Journal of High Energy Physics. 05(069). <http://hdl.handle.net/2027.42/49137>
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) × 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.
IOP Publishing Ltd
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