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

Understand

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.