Decoupling Limits in M-Theory

Abstract

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.

23 Pages, Tex, Phyzzx Macro. Minor corrections

References in corpus (1)

• Gravitational Duality, Branes and Charges

Cited by in corpus (3)

• U-duality and M-Theory
• On Domain-Wall/QFT Dualities in Various Dimensions
• Brane intersections, anti-de Sitter spacetimes and dual superconformal theories