Non-Standard Intersections of S-Branes in D=11 Supergravity

TL;DR

This paper constructs new non-supersymmetric intersecting S-brane solutions in 11-dimensional supergravity, revealing novel configurations and their properties, including singularities and the influence of Chern-Simons terms.

Contribution

It introduces a systematic method for constructing non-standard intersecting S-brane solutions in D=11 supergravity, expanding the understanding of non-supersymmetric brane configurations.

Findings

Solutions lack supersymmetry and are obtained by proportional charges.

Two categories of solutions based on the presence of non-diagonal terms.

Some solutions involve non-zero Chern-Simons contributions and exhibit singularities.

Abstract

We construct new intersecting S-brane solutions in 11-dimensional supergravity which do not have supersymmetric analogs. They are obtained by letting brane charges to be proportional to each other. Solutions fall into two categories with respect to whether there is a non-diagonal term to be cancelled in the field equations or not. In each case we show that they can be constructed by using a simple set of rules which is similar to the harmonic function rule of the usual static p-branes. Furthermore, we study an intersection where the Chern-Simons term makes a non-zero contribution to the field equations. We show that this configuration has a singularity like other S-branes.