IceCube PeV neutrinos and leptophilic dark matter

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Chianese, Marco^1,2

Dipartimento di Fisica Ettore Pancini, Università di Napoli Federico II, Complesso Univ. Monte S. Angelo, Napoli

I-80126, Italy^1

INFN, Sezione di Napoli, Complesso Univ. Monte S. Angelo, Napoli

I-80126, Italy^2

关键词: Astrophysical sources;    Dark matter;    Dark matter particles;    Energy scale;    Final state;    Galactic Center;    High energy neutrinos;    Three body;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/4/042014/pdf
DOI  :  10.1088/1742-6596/718/4/042014

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We analyze the scenario where the IceCube high energy neutrino events are explained in terms of an extraterrestrial flux due to two different components: a contribution coming from know astrophysical sources for energies up to few hundreds TeV and a top-down contribution originated by the decay of heavy dark matter particles with a mass of few PeV. Contrary to previous approaches, we consider a leptophilic three-body decay that dominates at PeV energies due to the absence of quarks in the final state. We find that the theoretical predictions of such a scenario are in a slightly better agreement with the IceCube data if the astrophysical component has a cut-off at about 100 TeV. This interpretation of IceCube data can be easily tested in the near future since the decaying dark matter scenario predicts a sharp cut-off at PeV energy scale and the observation of an anisotropy towards Galactic Center of our Galaxy in contrast with the isotropic astrophysical flux.