Author

R. Conceição

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Preprint Oct 2026

Identification of ultra-high-energy neutrinos in vertical air showers with surface detectors

We investigate the potential of surface detector arrays to identify ultra-high-energy neutrinos using vertical air showers with zenith angle $\theta \leq 60^\circ$, a region largely unexplored in current searches. The method exploits the enhanced electromagnetic component at ground level arising from energetic leptons...

Jaime Álvarez-Muñiz, R. Conceição, P. J. Costa et al. · 0 citations

Preprint Aug 2026

Search for active-sterile neutrino transitions using Pierre Auger Observatory data

We investigate the sensitivity of the Pierre Auger Observatory to physics beyond the Standard Model arising from magnetic-moment-induced transitions between active and heavy sterile neutrinos. Such dipole portal interactions can enhance neutrino-nucleon cross sections above a kinematic threshold set by the sterile neut...

T. P. A. A. Halim, P. Abreu, M. Aglietta et al. · 0 citations