Extragalactic Blazar Diffuse Population Interpretation for the KM3-230213A event

The KM3NeT infrastructure is constructing two Cherenkov Neutrino detectors in the Mediterranean Sea: ARCA, optimised for high-energy cosmic neutrinos and located at 3450 m depth near Sicily, and ORCA, designed for neutrino oscillation studies at 2450 m depth off Toulon. Though still under construction, KM3NeT detectors are operational. An extremely-high-energy neutrino (hundreds of PeV) referred to as KM3-230213A was detected by the 21 lines of ARCA detector on 13, February 2024. This unique observation may offer new windows for very high energy neutrino astronomy and consequently deserves deep investigation. In this contribution, we study if blazars, a specific class of Active Galactic Nuclei (AGN), might have powered the KM3-230213A event. We start by simulating the lepto-hadronic interactions for blazar models using the open-access Astro-Multimessenger Modeling Software (AM3) software. Then, we quantify the diffuse gamma-ray and neutrino emission exploiting the Fermi-LAT blazar luminosity function and perform a statistical analysis to constrain the source population parameter. We conclude by discussing the potential interpretation of this ultra-high-energy neutrino in the context of blazars.