Decoupling Limits in M-Theory

Details Decoupling Limits in M-Theory Decoupling Limits in M-Theory

1998-03-15

arxiv.org/abs/hep-th/9803124v4

Nucl.Phys. B529 (1998) 207-224

Physics

High Energy Physics

High Energy Physics - Theory

23 Pages, Tex, Phyzzx Macro. Minor corrections

Scientific paper

10.1016/S0550-3213(98)00328-9

Limits of a system of N Dn-branes in which the bulk and string degrees of freedom decouple to leave a `matter' theory are investigated and, for n>4, either give a free theory or require taking $N \to \infty$. The decoupled matter theory is described at low energies by the $N \to \infty$ limit of n+1 dimensional \sym, and at high energies by a free type II string theory in a curved space-time. Metastable bound states of D6-branes with mass $M$ and D0-branes with mass $m$ are shown to have an energy proportional to $M^{1/3}m^{2/3}$ and decouple, whereas in matrix theory they only decouple in the large N limit.

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