Wrapped brane gas as a candidate for Dark Matter

TL;DR

This paper explores wrapped branes in string theory compactifications as potential dark matter candidates, analyzing their mass and charge properties in four-dimensional effective theories derived from higher-dimensional models.

Contribution

It introduces a detailed analysis of brane properties in type II string models, highlighting their potential as light, weakly charged dark matter particles in four dimensions.

Findings

Wrapped branes can have light masses in the Einstein frame.

Charges of wrapped branes are small and dual to their masses.

Mass and charge relations are time-independent in 4D Einstein frame.

Abstract

We consider brane gas models based on type II string theories and analyze the mass, the Ramond-Ramond charge and the charge on moduli fluctuations of branes wrapping over cycles of a compactified space in the four-dimensional Einstein frame. A six-dimensional torus and Calabi-Yau threefolds are considered for the Kaluza-Klein reduction. A large volume of the compactified space and a weak string coupling gives rise to point particles of the wrapped branes which have a light mass and a small charge of the Ramond-Ramond flux and of the moduli fluctuations, while the particles become very heavy in the string frame. We find that the masses and the charges satisfy the sea-saw like dual relations which become time-independent in the four-dimensional Einstein frame.