On the non-detection of Glashow resonance in IceCube

Sarira Sahu; Bing Zhang

doi:10.1016/j.jheap.2018.01.003

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arXiv · 1612.09043

On the non-detection of Glashow resonance in IceCube

Sarira Sahu·Bing Zhang

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Abstract

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 50 to 70 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.

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Sarira Sahu, Bing Zhang. 2016-12-29. On the non-detection of Glashow resonance in IceCube. https://doi.org/10.1016/j.jheap.2018.01.003

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