# Coherent transition radiation from the geomagnetically-induced current in cosmic-ray air showers: Implications for the anomalous events observed by ANITA

## TL;DR

This paper proposes that coherent transition radiation from geomagnetic currents explains anomalous ANITA events, emphasizing its importance in modeling radio emissions from cosmic-ray air showers crossing dielectric boundaries.

## Contribution

It introduces the role of coherent transition radiation from geomagnetic currents as a key factor in explaining ANITA's anomalous events, expanding current radio emission models.

## Key findings

- CTR-GM can significantly alter electric field emissions at zenith angles <70°
- Including CTR-GM is essential for accurate radio emission modeling
- CTR-GM explains the anomalous events observed by ANITA

## Abstract

We show that coherent transition radiation from the electrically-neutral transverse geomagnetic current (CTR- GM) in a cosmic-ray air shower provides a natural, standard model, explanation to the recent ``anomalous'' events observed by the ANITA detector. We demonstrate that for zenith angles less than roughly 70 degrees, combined with high surface elevation, the inclusion of CTR-GM can significantly alter the emitted electric field from a cosmic-ray air shower. CTR-GM therefore has to be included in radio emission models to provide a full description of the radio emission from a high-energy cosmic-ray air shower traversing a dielectric boundary.