Taming the supergravity description of non-BPS D-branes: the D/Dbar solution

Details Taming the supergravity description of non-BPS D-branes: the D/Dbar solution Taming the supergravity description of non-BPS D-branes: the D/Dbar solution

2000-12-21

arxiv.org/abs/hep-th/0012211v2

JHEP 0104 (2001) 014

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, Latex, uses JHEP.cls. Substantial revision; in particular, clarification of the two T-dual descriptions in section 2

Scientific paper

10.1088/1126-6708/2001/04/014

We obtain the supergravity solution which describes a bound state of D-string/anti-D-string pairs attached to different fixed planes of an orbifold, in type IIB string theory compactified on T^4/Z_2. For parameters at which the conformal field theory point of view predicts stability, the solution displays a repulson-like singularity. However, we observe that a D-string/anti-D-string pair probe in this background becomes tensionless before reaching the singularity, suggesting a resolution by the enhancon mechanism. Moreover, the force feels by this probe is attractive, in contrast to the repulsive behaviour observed in the non-BPS D-brane description.

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