Dimensional reductions of M-theory S-branes to string theory S-branes

TL;DR

This paper explores how space-like M-theory branes can be reduced to string theory S-branes, revealing unique features and specific reduction methods involving delocalized and anisotropic solutions.

Contribution

It demonstrates the reduction process from M-theory S-branes to string theory S-branes, highlighting peculiarities and the necessity of specialized solutions.

Findings

Reduction from SM2/SM5 to SD2/SNS5 and SNS1/SD4-branes achieved

Different reduction techniques require delocalized or anisotropic solutions

Identifies peculiarities in space-like brane reductions compared to time-like cases

Abstract

We study both the direct and the double dimensional reduction of space-like branes of M-theory and point out some peculiarities in the process unlike their time-like counterpart. In particular, we show how starting from SM2 and SM5-brane solutions we can obtain SD2 and SNS5-brane as well as SNS1 and SD4-brane solutions of string theory by direct and double dimensional reductions respectively. In the former case we need to use delocalized SM-brane solutions, whereas in the latter case we need to use anisotropic SM-brane solutions in the directions which are compactified.