Abstract
IceCube has changed the rules of the game and continues to progress. Their observations are compatible with cosmic neutrinos undergoing 3 flavor oscillations. The topologies of the events have been used to probe ordinary and exotic physics. Still, we need independent confirmations of this assumption; the astrophysical connections heavily rely on speculations (excepting special cases, such as GRB); the amount of prompt events is not known precisely; double bang and/or Glashow resonance events are still to be seen; the energy and the angular distributions are not well-known, even if the simplest picture (isotropic flux, power law distributed in energy) is still compatible with the data. In this talk, we select specific topics concerning expectations, inferences and prospects.
Highlights
IceCube has changed the rules of the game and continues to progress. Their observations are compatible with cosmic neutrinos undergoing 3 flavor oscillations
We need independent confirmations of this assumption; the astrophysical connections heavily rely on speculations; the amount of prompt events is not known precisely; double bang and/or Glashow resonance events are still to be seen; the energy and the angular distributions are not well-known, even if the simplest picture is still compatible with the data
It is interesting that the cosmic neutrino signal has a slope similar ∼ 2.7 and it is certainly important that, as claimed by IceCube, that prompt events, even if present, do not explain the bulk of observations
Summary
Cosmic rays of sufficiently high energies produce charm mesons interacting in the atmosphere Their decays, differently from those of pion and kaon mesons, are very fast and produce the so called prompt neutrinos. It is interesting that the cosmic neutrino signal has a slope similar (slightly below) ∼ 2.7 and it is certainly important that, as claimed by IceCube, that prompt events, even if present, do not explain the bulk of observations. This leaves us the task of finding prompt events, or to understand “why IceCube lacks of charm”. The answer could be quite simple but it is important to know it
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