Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 29: Kosmische Strahlung II

T 29.9: Talk

Tuesday, March 20, 2018, 18:35–18:50, Philo-HS6

Model for photo-nuclear interactions in sources of UHECR and astrophysical neutrinos — •Leonel Morejon, Anatoli Fedynitch, and Walter Winter — DESY Zeuthen, Platanenallee 6, D-15738 Zeuthen

Although the origin of UHECR is still undetermined, their potential sources have to belong the most violent class of astrophysical objects (e.g. TDEs, GRBs, AGNs), and, according to the Auger Observatory, the sources have to contain heavier nuclei. The production and transport of multiple astrophysical messengers (gamma, neutrinos and CR) inside these sources is described through coupled Boltzmann equations, which require as an input photo-nuclear cross sections for interactions of nuclei with dense photon fields. It has been shown that detailed multi-messenger calculations depend on the production properties of secondary particles and the nuclear physics that governs the disintegration of the interacting nucleus and initiates nuclear cascades in the accelerator. In this work, we give up some of the simplifications that were widely used in the past and study the impact of a more detailed photo-nuclear model on multi-messenger predictions.