Alpha-prime corrections to space-like branes

Details Alpha-prime corrections to space-like branes Alpha-prime corrections to space-like branes

2007-07-10

arxiv.org/abs/0707.1422v2

JHEP 0710:007,2007

Physics

High Energy Physics

High Energy Physics - Theory

18 pp; v2: Major changes in the constant dilaton backgrounds and some sections are rearranged

Scientific paper

10.1088/1126-6708/2007/10/007

Space-like branes or S-branes are certain class of time dependent solutions of M/string theories having isometries ISO(p+1) $\times$ SO(d-p-2,1), where $d=11,10$ respectively and have singularities at t=0. In \cite{Roy:2006du}, we found that the asymptotically flat S-branes have the structure of generalized Kasner geometry near t=0. In this work we evaluate higher order $\alpha'$ corrections perturbatively to the heterotic string Kasner backgrounds to probe the singularity at t=0. We generally find that the perturbative corrections do not permit us to reach the singular point, as the supergravity framework fails near $t \sim {\sqrt \alpha'}$ blurring the origin of space-like singularities. This is analogous to the concept of stretched horizons in the case of black holes.

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