Why not any tau double bang in Icecube, yet?

TL;DR

Despite recent hints of astrophysical signals, IceCube has yet to observe definitive tau neutrino double bang events, with current data suggesting a dominant atmospheric neutrino flux and some intriguing astrophysical correlations.

Contribution

The paper proposes that the neutrino flux is primarily atmospheric with potential astrophysical components indicated by recent muon and cosmic ray observations.

Findings

No confirmed tau double bang events observed.

Recent muon crossings suggest possible astrophysical neutrino contribution.

Correlated cosmic ray events hint at astrophysical sources.

Abstract

High Energy Neutrino Astronomy has been revealed by a sudden change in the flavor composition around maximal energies since three years of recording in ice km detector. However these discover didn' t led to any clear promised Neutrino Astronomy land yet. No correlation with hard gamma sources was found. Moreover the astrophysical spectra expected at Fermi value, seem to converge to a softer value, also required to avoid any Glashow resonant neutrino signal. We suggest a main solution within a composite flux ruled by prompt atmospheric neutrinos. Nevertheless the recent discover of twentyone crossing muons at hundreds TeVs had shown a first narrow overlapped doublet and a correlated track with a peculiar hard UHECR event clustering pointing to a well known microjet in bynary precession; these first connections hint for a non negligible astrophysical component making neutrino astronomy anyway already more than a hope.