Conformal Theory of M2, D3, M5 and `D1+D5' Branes

TL;DR

This paper presents conformally invariant actions for M2, D3, M5, and D1+D5 branes in near-horizon backgrounds, revealing their symmetry structures and reducing to interacting conformal field theories in lower dimensions.

Contribution

It introduces new brane actions with manifest SO(p+1,2) invariance and derives their reduction to lower-dimensional conformal field theories, including a D-string in D1+D5 background.

Findings

Brane actions exhibit SO(p+1,2) conformal symmetry.

Reduction to (p+1)-dimensional interacting field theories.

Explicit conformal field theory on a D-string in D1+D5 background.

Abstract

The bosonic actions for M2, D3 and M5 branes in their own d-dimensional near-horizon background are given in a manifestly SO(p+1,2) x SO(d-p-1) invariant form (p=2,3,5). These symmetries result from a breakdown of ISO(d,2) (with d=10 for D3 and d=11 for M2 and M5) symmetry by the Wess-Zumino term and constraints. The new brane actions, reduce after gauge-fixing and solving constraints to (p+1) dimensional interacting field theories with a non-linearly realized SO(p+1,2) conformal invariance. We also present an interacting two-dimensional conformal field theory on a D-string in the near-horizon geometry of a D1+D5 configuration.