Is a classical description of stable non-BPS D-branes possible?

Details Is a classical description of stable non-BPS D-branes possible? Is a classical description of stable non-BPS D-branes possible?

2000-07-12

arxiv.org/abs/hep-th/0007097v2

Nucl.Phys. B590 (2000) 471-503

Physics

High Energy Physics

High Energy Physics - Theory

Latex file: 41 pages, 5 figures; some minor corrections and references added

Scientific paper

10.1016/S0550-3213(00)00558-7

We study the classical geometry produced by a stack of stable (i.e. tachyon free) non-BPS D-branes present in K3 compactifications of type II string theory. This classical representation is derived by solving the equations of motion describing the low-energy dynamics of the supergravity fields which couple to the non-BPS state. Differently from what expected, this configuration displays a singular behaviour: the space-time geometry has a repulson-like singularity. This fact suggests that the simplest setting, namely a set of coinciding non-interacting D-branes, is not acceptable. We finally discuss the possible existence of other acceptable configurations corresponding to more complicated bound states of these non-BPS branes.

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