Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 71: Eingeladene Vorträge III

T 71.3: Semi-Invited Talk

Thursday, March 22, 2018, 14:48–15:12, Z6 - HS 0.001

UHECR propagation: interactions and secondary messengers — •Denise Boncioli — DESY, Platanenallee 6, 15738 Zeuthen

Ultra high energy cosmic rays (UHECRs) are accelerated in astrophysical sources and travel through the extragalactic space before hitting the Earth atmosphere. They interact both with the environment in the source and with the intergalactic photon fields they encounter, causing different processes at various scales depending on the photon energy in the nucleus rest frame. The general implications of the situation of nuclear measurements for cosmic ray astrophysics will be discussed, from the point of view of the propagation and of the candidate sources of cosmic rays. The sensitivity of the UHECR observables and of the secondary messengers like neutrinos and photons to uncertainties in the extragalactic background light and photo-disintegration models will be also described. The possibility of using secondary messengers as a powerful tool to unveil the UHECR sources will be also pointed out.