KM3NeT upper bounds of detection rates of solar neutrinos from annihilations of dark matter at the solar core

TL;DR

This paper evaluates the potential of the KM3NeT detector to observe neutrinos from dark matter annihilations in the Sun, providing upper detection rate bounds for various dark matter models and masses.

Contribution

It introduces a method to compute upper bounds on neutrino detection rates at KM3NeT for generic and specific dark matter scenarios, incorporating experimental constraints.

Findings

Upper bounds on muon event rates vary with dark matter mass and annihilation channels.

Detection prospects depend on dark matter scattering cross-section limits from PandaX-4T.

Results inform the sensitivity of KM3NeT to solar dark matter annihilation signals.

Abstract

The Weakly Interacting Massive Particles (WIMPs) so far remain one of the most popular candidates for dark matter. If captured gravitationally inside the core of the Sun, these WIMPs may produce high energy neutrinos as the end product in case they undergo self annihilations at the solar core. In this work, we address the detectability of such neutrinos at the proposed KM3NeT detector. Upper bounds of the detection rate for such neutrinos at KM3NeT are computed for the case of a generic dark matter scenario and also when specific models for particle dark matter are chosen. In this work, upper bounds of muon event rates for different annihilating dark matter masses are computed for each of the cases of dark matter annihilation channels (e.g. $b\bar{b}~, W^+W^-, Z\bar{Z} $ etc). These upper bounds are also computed by considering the dark matter scattering cross-section using upper bounds obtained from PandaX-4T direct dark matter search experiment.