Neutrino Signals from Annihilating/Decaying Dark Matter in the Light of Recent Measurements of Cosmic Ray Electron/Positron Fluxes

TL;DR

This paper explores how dark matter annihilation or decay, explaining cosmic-ray electron/positron excesses, could produce detectable high-energy neutrinos, with current and future experiments constraining or confirming these models.

Contribution

It demonstrates that dark matter models explaining cosmic-ray excesses also predict neutrino signals, providing a new observational avenue for dark matter detection.

Findings

Dark matter annihilation/decay can produce high-energy neutrinos.

Super-Kamiokande constrains some dark matter models.

Future neutrino detectors could confirm these signals.

Abstract

The excess of cosmic-ray electron and positron fluxes measured by the PAMELA satellite and ATIC balloon experiments may be interpreted as the signals of the dark matter annihilation or decay into leptons. In this letter we show that the dark matter annihilation/decay which reproduces the electron/positron excess may yield a significant amount of high-energy neutrinos from the Galactic center. In the case, future kilometer-square size experiments may confirm such a scenario, or even the Super-Kamiokande results already put constraints on some dark matter models.