Erlangen 2026 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 82: Neutrino Astronomy IV
T 82.7: Talk
Thursday, March 19, 2026, 17:45–18:00, KS H C
Charm Contributions to Multi-Messenger Emissions in Dense AGN Environments* — •Vladimir Kiselev1,2, Julia Becker Tjus1,2,3, Rikard Enberg4, and Julien Dörner1,2 — 1Theoretical Physics IV: Plasma Astroparticle Physics, Ruhr University Bochum — 2RAPP Center, Bochum — 3Department of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Sweden — 4Department of Physics and Astronomy, Uppsala University, Sweden
Active galactic nuclei (AGN) are compelling sites for high-energy neutrino production, yet the balance between light-meson (π, 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 with a Hadronic Interaction Module for pp interactions with secondary tagging. Inclusive energy-differential cross sections d σ / d xE 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 in which π/K channels can be suppressed while short-lived charm hadrons remain effectively prompt and can contribute significantly to the neutrino signal. 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. *Supported by DFG (SFB 1491)
Keywords: AGN; neutrinos