Mind the gap on Icecube: Cosmic neutrino spectrum and muon anomalous magnetic moment in the gauged L_{\mu} - L_{\tau} model

TL;DR

This paper explores whether a leptonic gauge interaction model can simultaneously explain the IceCube cosmic neutrino spectrum gap and the muon anomalous magnetic moment discrepancy, providing insights into neutrino sources.

Contribution

It demonstrates that the gauged L_{} - L_{} model can address both the neutrino spectrum gap and muon g-2 anomaly within certain parameter regions.

Findings

The model can simultaneously explain the neutrino gap and muon g-2 discrepancy.

Parameter space regions are identified that fit both phenomena.

Results suggest potential clues about the distance to high-energy neutrino sources.

Abstract

The energy spectrum of cosmic neutrinos, which was recently reported by the IceCube collaboration, shows a gap between 400 TeV and 1 PeV. An unknown neutrino interaction mediated by a field with a mass of the MeV scale is one of the possible solutions to this gap. We examine if the leptonic gauge interaction L_{\mu} - L_{\tau} can simultaneously explain the two phenomena in the lepton sector: the gap in the cosmic neutrino spectrum and the unsettled disagreement in muon anomalous magnetic moment. We illustrate that there remains the regions in the model parameter space, which account for both the problems. Our results also provide a hint for the distance to the source of the high-energy cosmic neutrinos.