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The next generation of neutrino telescopes will feature unprecedentedsensitivities in the detection of neutrinos. Here we study the capabilities ofa large-scale neutrino telescope, like the fully-operating KM3NeT experiment inthe near future, for detecting dark matter annihilation signals from theGalactic Centre. We consider both ORCA and ARCA detectors, covering dark mattermasses from a few GeV to 100 TeV. We obtain the sensitivities with amaximum-likelihood analysis method and present them as upper limits in thethermally averaged annihilation cross-section into Standard Model fermions. Ourprojections show that the sensitivity of such a neutrino telescope can reachthe thermal relic line for $m_{\chi}\gtrsim 1\,{\rm TeV}$ and for $m_\chi\simeq$ few GeV, for the NFW dark matter density profile. This demonstratesthat ORCA- and ARCA-like detectors will be able to perform competitive darkmatter searches in a wide range of masses. The implications of these strikingprojections are investigated in a few selected dark matter particle models,where we show that neutrino telescopes are able to probe new parameter space.

Towards detecting super-GeV dark matter via annihilation to neutrinos