Speaker
Description
The KM3NeT/ARCA neutrino telescope, currently under construction in the Mediterranean
Sea, is already collecting data in several partial detector configurations, enabling searches
for astrophysical neutrino sources. In this contribution, we present an overview of the
stacking analyses developed within KM3NeT/ARCA to search for cumulative high-energy
neutrino emission from classes of astrophysical sources. The analyses exploit both partial
and progressively larger detector configurations, allowing a continuous improvement of
sensitivity while the detector is being completed. Dedicated binned likelihood stacking
frameworks have been developed and applied to different source populations, including
active galactic nuclei, blazars and Starburst galaxies, using catalog-based selections and
physically motivated weighting schemes. The expected neutrino fluxes are derived either
through theoretical source modelling or through model-independent assumptions, and are
compared with KM3NeT/ARCA observations. These results provide a coherent picture of the
current status of stacking searches in KM3NeT/ARCA and establish a solid basis for future
analyses with the full detector.