Reconstruction of inclined extensive air showers using radio signals: From arrival times and amplitudes to direction and energy

• Autores: Guelfand, Marion; Decoene, Valentin; Martineau Huynh, Olivier; Prunet, Simon; Tueros, Matias Jorge; Macias, Oscar; Benoit Lévy, Aurélien
• Año de publicación: 2025
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: Ultra-High-Energy Astroparticles; Extensive Air Showers,; Radio-Detection; Reconstruction
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Radio detection is now an established technique for the study of ultra-high-energy (UHE) cosmic rays with energies above ∼ 10^17 eV. The next-generation of radio experiments aims to extend this technique to the ob-servation of UHE earth-skimming neutrinos, which requires the detection ofvery inclined extensive air showers (EAS). In this article we present a newreconstruction method for the arrival direction and the energy of EAS. Itcombines a point-source-like description of the radio wavefront with a phe-nomenological model: the Angular Distribution Function (ADF). The ADFdescribes the angular distribution of the radio signal amplitude in the 50-200 MHz frequency range, with a particular focus on the Cherenkov angle,a crucial feature of the radio amplitude pattern. The method is applica-ble to showers with zenith angles larger than 60°, and in principle up toneutrino-induced showers with up-going trajectories. It is tested here on asimulated data set of EAS induced by cosmic rays. A resolution better than 4 arc-minutes (0.07°) is achieved on arrival direction, as well as an intrin-sic resolution of 5% on the electromagnetic energy, and around 15% on theprimary energy.
Fil: Guelfand, Marion. Campus Pierre Et Marie Curie ; Sorbonne University;
Fil: Decoene, Valentin. Universite de Nantes; Francia
Fil: Martineau Huynh, Olivier. Campus Pierre Et Marie Curie ; Sorbonne University;
Fil: Prunet, Simon. Observatoire de la Cote D'Azur; Francia
Fil: Tueros, Matias Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
Fil: Macias, Oscar. San Francisco State University; Estados Unidos
Fil: Benoit Lévy, Aurélien. Universite Paris-saclay (universite Paris-saclay);