PoS - Proceedings of Science
Volume 424 - 9th International Workshop on Acoustic and Radio EeV Neutrino Detection Activities (ARENA2022) - Air shower simulations
Simulation Study of the Detection of Inclined Photon Air Showers with the AugerPrime Radio Detector
J. Pawlowsky*  on behalf of the Pierre Auger Collaboration
Full text: pdf
Pre-published on: June 23, 2023
Published on: October 25, 2023
Abstract
The Pierre Auger Observatory is the largest Cosmic Ray (CR) observatory with a size of
$\approx$ 3000 km$^2$ . Its size makes it feasible to not only look for CRs but also for presumably rare
primaries like photons at energies larger than 1 EeV. Strong upper limits on the diffuse photon
flux have been set in the past using the Surface Detector (SD). Additionally, air showers with
photon-like properties were detected. For these photon candidate events, however, an uncertainty
remains regarding whether they are of photon origin or possibly misinterpreted hadrons. With the
AugerPrime upgrade, the SD is complemented by the Radio Detector (RD). The combination of
both detectors yields new information about air showers and will improve primary identification.
Here, inclined photon showers are of special interest as they have a negligible particle footprint but
strong radio emission. This is in contrast to hadronic primaries, where a strong particle footprint
is expected for inclined air showers as well. The difference is investigated in simulation studies
to determine the primary discrimination power of the AugerPrime detector with a given trigger
concept. We will quantify the discrimination power and introduce parameters for the photon-
hadron-separation. We will present an outlook on future prospects of the analysis.
DOI: https://doi.org/10.22323/1.424.0054
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