S-Branes, Negative Tension Branes and Cosmology

TL;DR

This paper explores generalized string background solutions related to S-branes and negative tension branes, analyzing their physical properties, cosmological implications, and stability, extending black p-brane solutions to curved surfaces.

Contribution

It introduces a broad class of solutions generalizing black p-branes to curved surfaces and relates them to S-branes, providing insights into their physical and cosmological roles.

Findings

Computed mass, charge, entropy, and temperature of solutions.

Linked solutions to negative tension branes and S-branes.

Discussed potential instabilities under perturbations.

Abstract

A general class of solutions of string background equations is studied and its physical interpretations are presented. These solutions correspond to generalizations of the standard black p-brane solutions to surfaces with curvature k=-1,0. The relation with the recently introduced S-branes is provided. The mass, charge, entropy and Hawking temperature are computed, illustrating the interpretation in terms of negative tension branes. Their cosmological interpretation is discussed as well as their potential instability under small perturbations.