PoS - Proceedings of Science
Volume 423 - 27th European Cosmic Ray Symposium (ECRS) - Indirect Measurements of Cosmic Rays
Searches for ultra-high energy photons and neutrinos with the Pierre Auger Observatory
N.M. Gonzalez*  on behalf of the Pierre Auger Collaboration
Full text: pdf
Pre-published on: February 15, 2023
Published on: December 14, 2023
The Pierre Auger Observatory is the largest astroparticle experiment in operation. Complementary to the measurements of the charged ultra-high energy (UHE) cosmic rays, it provides a very good sensitivity to the detection of UHE photons and neutrinos. Since the photon and neutrino fluxes are correlated to the acceleration mechanisms of charged particles, searches for these neutral particles enhance the multi-messenger understanding of UHE cosmic-ray sources and of transient astrophysical phenomena. In addition, searches for diffuse fluxes may bring information about exotic scenarios such as the decay of hypothetical super-heavy dark matter in the Galactic halo. In this contribution, we present an overview of the current UHE photon and neutrino searches at the Observatory and discuss the most recent results.
We report on stringent limits to the UHE photon and neutrino diffuse and point-like fluxes above $10^{17}\,$eV, which lead to strong constraints on theoretical models describing the nature of dark matter candidates and the sources of the most energetic particles in the Universe.
DOI: https://doi.org/10.22323/1.423.0089
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