Abstract
The ANTARES and IceCube neutrino telescopes have independently searched for neutrinos from dark matter pair-annihilation in the Galactic Centre, and placed limits on the velocity-averaged WIMP annihilation crosssection 〈σν〉. To date, the most stringent limits were obtained by the ANTARES neutrino telescope for WIMP masses > 100 GeV/c2, closely followed by the limits of the IceCube experiment for WIMP masses up to 1 TeV/c2. Here we present the sensitivities of a combined search for dark matter in the Galactic Centre using data from both experiments in a WIMP mass range from 100 GeV/c2 to 1 TeV/c2. This analysis includes IceCube data collected with the complete 86-strings detector from 2012 to 2015 and ANTARES data from 2007 to 2015. The two data sets were combined using a common likelihood framework, and before unblinding the combined sensitivities to 〈σν〉 are shown.
Highlights
The existence of cold, non-baryonic dark matter is well supported by astrophysical observations and motivates indirect searches for neutrinos from Weakly Interacting Massive Particles (WIMPs) pair annihilations
The ANTARES and IceCube neutrino telescopes have independently searched for neutrinos from dark matter pair-annihilation in the Galactic Centre, and placed limits on the velocity-averaged WIMP annihilation crosssection σv
The most stringent limits were obtained by the ANTARES neutrino telescope for WIMP masses > 100 GeV/c2, closely followed by the limits of the IceCube experiment for WIMP masses up to 1 TeV/c2
Summary
The existence of cold, non-baryonic dark matter is well supported by astrophysical observations and motivates indirect searches for neutrinos from Weakly Interacting Massive Particles (WIMPs) pair annihilations. Galaxies are embedded in a halo of thermal relic density of dark matter with a high density at the center, providing a target of interest for neutrino telescopes. Limits on WIMP dark matter annihilation crosssection have already been set by the ANTARES [1] and IceCube [2] neutrino experiments independently [3, 4], a gain in sensitivity can be achieved in the region where the two single-telescope sensitivities are comparable, for WIMP masses between 100 GeV/c2 and 1 TeV/c2. The purpose of this analysis is to combine the data of the two neutrino detectors by joining the probability density functions (PDFs) to build a two-component likelihood and provide combined limits on the cross section for WIMP pair-annihilation in the Galactic Centre
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