https://doi.org/10.1140/epjc/s10052-025-14559-2
Regular Article - Experimental Physics
Enhancing neutrino reconstruction in water-Cherenkov air shower arrays using multi-photosensors
1
Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
2
Dipartimento di Fisica “Ettore Pancini”, Università di Napoli “Federico II”, Naples, Italy
3
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli, Naples, Italy
4
LIP-Laboratório de Instrumentação e Física Experimental de Partículas, Lisbon, Portugal
5
Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
6
Scuola Superiore Meridionale, Naples, Italy
Received:
14
April
2025
Accepted:
23
July
2025
Published online:
5
August
2025
In this article, the potential of water Cherenkov detectors equipped with multi-PMT modules for background-free upward-going neutrino detection and improved direction reconstruction is demonstrated. By analyzing signal time traces with transformer-based models, significant improvements in angular resolution are achieved compared to previous designs with larger PMTs. These detectors enable the reconstruction of neutrino directions with resolutions of approximately 
in azimuth and 
in zenith for high-signal events, corresponding to an overall opening angle of approximately 
This design reduces saturation effects and enhances directional sensitivity, particularly for high-energy neutrinos. The results highlight the potential of WCD arrays as complementary tools for neutrino astronomy, particularly in the context of multimessenger observations of transient astrophysical sources. The nearly continuous operation and wide field of view of these detectors further enhance their suitability for real-time monitoring and alert generation.
© The Author(s) 2025
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Funded by SCOAP3.
