We discuss the spectrum of the different components in the astrophysical neutrino flux reaching the Earth, and the possible contribution of each component to the high-energy IceCube data. We show that the diffuse flux from cosmic ray (CR) interactions with gas in our galaxy implies just two events among the 54-event sample. We argue that the neutrino flux from CR interactions in the intergalactic (intracluster) space depends critically on the transport parameter δ describing the energy dependence in the diffusion coefficient of galactic CRs. Our analysis motivates a neutrino spectrum with a drop at PeV energies that fits the data well, including the non-observation of the Glashow resonance at 6.3 PeV. We also show that a CR flux described by an unbroken power law may produce a neutrino flux with interesting spectral features (bumps and breaks) related to changes in the CR composition.
Carceller, J.M., Illana, J.I., Masip, M., & Meloni, D. (2018). Origin of the High-energy Neutrino Flux at IceCube. THE ASTROPHYSICAL JOURNAL, 852(1), 59.
Titolo: | Origin of the High-energy Neutrino Flux at IceCube |
Autori: | MELONI, DAVIDE (Corresponding) |
Data di pubblicazione: | 2018 |
Rivista: | |
Citazione: | Carceller, J.M., Illana, J.I., Masip, M., & Meloni, D. (2018). Origin of the High-energy Neutrino Flux at IceCube. THE ASTROPHYSICAL JOURNAL, 852(1), 59. |
Handle: | http://hdl.handle.net/11590/327724 |
Appare nelle tipologie: | 1.1 Articolo in rivista |