BEXCO - Room F(201/202/203/204)
[CRI257] Nuclear physics meets sources of ultra-high energy cosmic rays
Every astrophysical environment where UHECR nuclei are accelerated and interact with the dense photon fields of the environment will also produce neutrinos. This depends on several aspects of the modelling of the related photo-nuclear physics in the energy range of the Giant Dipole Resonance and the Quasi Deuteron processes, and also in a regime where the production of pion occurs, which eventually will decay into neutrinos. We have studied in detail the properties of nuclear disintegration chains inside candidate accelerators, in particular for different models of gamma-ray bursts and AGNs, where we attempted to characterize the relevant phenomenology for cosmic ray escape and the role of intermediate masses (A<56). We find that over-simplified models for nuclear interactions, which are typically used in UHECR propagation codes and source models, have noticeable impact on the theoretical description of the source, and in addition, on the expectation of secondary messengers, like the diffuse neutrino flux.