Prospects of neutrino observations of the Central Molecular Zone and Cygnus OB2 with KM3NeT/ARCA

Parallel talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/) On behalf of the KM3NeT Collaboration Abstract: In this contribution we obtained the neutrino expectations of KM3NeT/ARCA for the Central Molecular Zone (CMZ) and the Cygnus Cocoon. The CMZ extends for a few hundred parsecs around the Galactic center, containing the massive molecular clouds Sgr A, Sgr B, and Sgr C which can act as targets for the high energy cosmic rays. The Cygnus Cocoon is a massive star-forming region of a few hundred parsecs in the Galactic plane. It contains regions with high gas densities and a young stellar population. The high energy emission from these regions is expected to be dominated by the interactions of cosmic-rays with the molecular gas, which translate into gamma-ray and neutrinos production. Here we present a search for neutrino emission from these two regions. We explored the sensitivities of the current KM3NeT/ARCA geometry as well as the case of the complete future detector.