Limits on Kaluza-Klein dark matter annihilation in the Sun from recent IceCube results

TL;DR

This paper uses recent IceCube data to set new limits on Kaluza-Klein dark matter annihilation in the Sun, improving previous constraints and extending the mass range down to 30 GeV.

Contribution

It provides the first comprehensive limits on Kaluza-Klein dark matter annihilation from IceCube data, covering a broad mass range and improving sensitivity.

Findings

Improved limits on annihilation rates and neutrino fluxes by up to an order of magnitude.

Extended the mass range of Kaluza-Klein dark matter constraints down to 30 GeV.

Set new bounds on the B^1-proton cross-sections.

Abstract

We interpret recent IceCube results on searches for dark matter accumulated in the sun in terms of the lightest Kaluza-Klein excitation (assumed here to be the Kaluza-Klein photon, $B^1$), obtaining improved limits on the annihilation rate in the Sun, the resulting neutrino flux at the Earth and on the $B^1$-proton cross-sections, for $B^1$ masses in the range 30--3000 GeV. These results improve previous results from IceCube in its 22-string configuration by up to an order of magnitude, depending on mass, but also extend the results to $B^1$ masses as low as 30 GeV.