Speaker
Description
Active galactic nuclei (AGN) are compelling sites for high-energy neutrino production, yet the balance between light-meson ($\pi, K$) and charm-hadron channels in dense, magnetised environments remains unresolved. We present a simulation-driven framework that couples a version of CRPropa designed for the AGN / jet environment and a Hadronic Interaction Module for $pp$ interactions with secondary tagging. Inclusive energy-differential cross sections $d \sigma / d x_E$ are computed and tabulated using chromo with Sibyll 2.3d, enabling consistent propagation from cosmic-ray injection to neutrino yields on finely sampled energy grids. By comparing decay, synchrotron, hadronic and adiabatic timescales, regimes are identified where $\pi/K$ channels can be suppressed while short-lived charm hadrons remain effectively prompt and could contribute to the neutrino signal significantly. The analysis points to coronae and dense jet substructures as potential "charm factories" within realistic acceleration limits. Validation of these qualitative indications using the framework through the spectral shape and flavour composition to isolate charm contributions is ongoing.
