"On the non-detection of Glashow resonance in IceCube"
Dr. Sarira Sahu, ICN-UNAM
Electron anti-neutrinos at the Glashow resonance (GR, at $E_{\bar \nu_e}
\sim 6.3$ PeV) have an enhanced probability to be detected. With three
neutrinos detected by IceCube in the (1-2) PeV energy range at
present, one would expect that about 1 to 4 GR $\bar\nu_e$ should have been
detected. The high-energy $\sim 8.7$ PeV muon neutrino detected by IceCube
may not be a GR event. If so, we expect to detect 52 to 72 GR $\bar\nu_e$,
then one would have a``missing Glashow-resonance problem''. This would
suggest (1) that $p\gamma$ interaction rather than $pp$ interaction is the
dominant channel to produce the observed IceCube high-energy neutrinos; (2)
that multi-pion $p\gamma$ interactions are suppressed; and (3)
that the magnetic field and photon energy density in the $p\gamma$
emission region is such that significant $\mu^+$ cooling occurs before
decaying, yet $\pi^+$'s essentially do not cool before decaying.