A model explaining neutrino masses and the DAMPE cosmic ray electron excess

TL;DR

This paper introduces a flavored $U(1)_{e}$ model that explains the DAMPE cosmic ray excess with a dark matter candidate annihilating into electrons and muons, predicting testable collider and detection signals.

Contribution

It presents a novel flavored gauge symmetry model linking neutrino masses and dark matter to explain the DAMPE excess, with specific mass predictions for new particles.

Findings

Dark matter candidate mass around 1.5 TeV

New gauge boson $Z'$ mass around 2.6 TeV

Model predictions testable by future colliders and detection experiments

Abstract

We propose a flavored $U(1)_{e\mu}$ neutrino mass and dark matter~(DM) model to explain the recent DArk Matter Particle Explorer (DAMPE) data, which feature an excess on the cosmic ray electron plus positron flux around 1.4 TeV. Only the first two lepton generations of the Standard Model are charged under the new $U(1)_{e\mu}$ gauge symmetry. A vector-like fermion $\psi$, which is our DM candidate, annihilates into $e^{\pm}$ and $\mu^{\pm}$ via the new gauge boson $Z'$ exchange and accounts for the DAMPE excess. We have found that the data favors a $\psi$ mass around 1.5~TeV and a $Z'$ mass around 2.6~TeV, which can potentially be probed by the next generation lepton colliders and DM direct detection experiments.