Explaining the ANITA events by a $L_e-L_\tau$ gauge model

TL;DR

This paper proposes a new $L_e -L_ au$ gauge model with Weyl fermions to explain ANITA's high-energy anomalous events, potentially linking neutrino observations to dark matter and future collider tests.

Contribution

It introduces a novel $L_e -L_ au$ gauge interaction model with Weyl fermions that accounts for ANITA anomalies and suggests dark matter candidates.

Findings

The model explains ANITA's anomalous events at high energies.

It remains consistent with IceCube and Auger bounds.

It predicts testable signals for future collider experiments.

Abstract

The ANITA experiment has registered two anomalous events that can be interpreted as $\nu_\tau$ or $\bar{\nu}_\tau$ with a very high energy of $\mathcal{O}(0.6)$~EeV emerging from deep inside the Earth. At such high energies, the Earth is opaque to neutrinos so the emergence of these neutrinos at such large zenith angles is a mystery. In our paper, we present a model that explains the two anomalous events through a $L_e -L_\tau$ gauge interaction involving two new Weyl fermions charged under the new gauge symmetry. We find that, as a bonus of the model, the lighter Weyl fermion can be a dark matter component. We discuss how the ANITA observation can be reconciled with the IceCube and Auger upper bounds. We also demonstrate how this model can be tested in future by collider experiments.