Limits on a muon flux from Kaluza-Klein dark matter annihilations in the Sun from the IceCube 22-string detector

TL;DR

This study used IceCube's 22-string detector to search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun, setting the most stringent limits to date on LKP annihilation.

Contribution

First search for muon neutrinos from Kaluza-Klein dark matter in the Sun using IceCube 22-string data, establishing new upper limits on annihilation rates and cross-sections.

Findings

No excess neutrinos observed over background.

Set the most stringent limits on LKP annihilation in the Sun.

Constrained LKP-proton cross-sections for masses 250-3000 GeV.

Abstract

A search for muon neutrinos from Kaluza-Klein dark matter annihilations in the Sun has been performed with the 22-string configuration of the IceCube neutrino detector using data collected in 104.3 days of live-time in 2007. No excess over the expected atmospheric background has been observed. Upper limits have been obtained on the annihilation rate of captured lightest Kaluza-Klein particle (LKP) WIMPs in the Sun and converted to limits on the LKP-proton cross-sections for LKP masses in the range 250 -- 3000 GeV. These results are the most stringent limits to date on LKP annihilation in the Sun.