par Aartsen, M. G.;Aguilar Sanchez, Juan Antonio ;Ansseau, Isabelle ;Heereman von Zuydtwyck, David ;Iovine, Nadège ;Meagher, Kevin ;Meures, Thomas ;O'Murchadha, Aongus ;Pinat, Elisa ;Raab, Christoph ;Toscano, Simona
Référence European Physical Journal C. Particles and Fields, 78, 10, 831
Publication Publié, 2018-10
Référence European Physical Journal C. Particles and Fields, 78, 10, 831
Publication Publié, 2018-10
Article révisé par les pairs
Résumé : | With the observation of high-energy astrophysical neutrinos by the IceCube Neutrino Observatory, interest has risen in models of PeV-mass decaying dark matter particles to explain the observed flux. We present two dedicated experimental analyses to test this hypothesis. One analysis uses 6 years of IceCube data focusing on muon neutrino ‘track’ events from the Northern Hemisphere, while the second analysis uses 2 years of ‘cascade’ events from the full sky. Known background components and the hypothetical flux from unstable dark matter are fitted to the experimental data. Since no significant excess is observed in either analysis, lower limits on the lifetime of dark matter particles are derived: we obtain the strongest constraint to date, excluding lifetimes shorter than 1028s at 90% CL for dark matter masses above 10TeV. |