Decaying Hidden Dark Matter in Warped Compactification

TL;DR

This paper proposes a string theory-based model of decaying hidden dark matter in warped compactifications to explain cosmic ray excesses observed by experiments like PAMELA and Fermi.

Contribution

It introduces a novel decaying hidden dark matter framework within warped string compactifications, incorporating hidden light particles that decay into Standard Model particles.

Findings

Model explains electron and positron excesses without anti-proton excess.

Uses warped Kaluza-Klein particles as dark matter candidates.

Provides a string theory realization of decaying hidden dark matter.

Abstract

The recent PAMELA and ATIC/Fermi/HESS experiments have observed an excess of electrons and positrons, but not anti-protons, in the high energy cosmic rays. To explain this result, we construct a decaying hidden dark matter model in string theory compactification that incorporates the following two ingredients, the hidden dark matter scenario in warped compactification and the phenomenological proposal of hidden light particles that decay to the Standard Model. In this model, on higher dimensional warped branes, various warped Kaluza-Klein particles and the zero-mode of gauge field play roles of the hidden dark matter or mediators to the Standard Model.