A detailed comparison of REAS3 and MGMR simulations for radio emission from EAS

TL;DR

This paper compares two radio emission simulation models for cosmic ray air showers, highlighting their similarities and differences, and emphasizes the impact of air shower models on predictions, advancing understanding in the field.

Contribution

It provides a detailed comparison of MGMR and REAS3 models, clarifying their agreement and the influence of air shower models on radio emission predictions.

Findings

Majority of discrepancies are due to air shower models

Both models show general agreement in predictions

Understanding of radio emission modeling has improved

Abstract

In the last years, several models and simulations calculating the radio emission from cosmic ray air showers have been developed. However, a number of those made conflicting predictions on the pulse shapes and the amplitudes of the radio signal. In the scope of this paper, we discuss a detailed comparison of two independent and complementary theoretical approaches, namely MGMR and REAS3. Furthermore, we study the influence of the underlying air shower models on the predicted pulse shapes and amplitudes and show that remaining discrepancies between MGMR and REAS3 are mostly determined by the air shower models. With this general agreement, a breakthrough in the understanding of the modelling of radio emission from air showers has been achieved.