MeV scale leptonic force for cosmic neutrino spectrum and muon anomalous magnetic moment

TL;DR

This paper proposes an MeV-scale leptonic force to simultaneously explain cosmic neutrino spectrum features and the muon g-2 anomaly, linking phenomena across multiple energy scales.

Contribution

It introduces a new leptonic force mediator that accounts for cosmic neutrino observations and muon magnetic moment discrepancy within a unified framework.

Findings

Cosmic neutrino flux affected by new leptonic interactions.

The model explains muon g-2 anomaly.

Potential insights into neutrino mass spectrum and source distribution.

Abstract

Characteristic patterns of cosmic neutrino spectrum reported by the IceCube collaboration and long-standing inconsistency between theory and experiment in muon anomalous magnetic moment are simultaneously explained by an extra leptonic force mediated by a gauge field with a mass of the MeV scale. With different assumptions for redshift distribution of cosmic neutrino sources, diffuse neutrino flux is calculated with the scattering between cosmic neutrino and cosmic neutrino background through the new leptonic force. Our analysis sheds light on a relation among lepton physics at the three different scales, PeV, MeV, and eV, and provides possible clues to the distribution of sources of cosmic neutrino and also to neutrino mass spectrum.