Propagation of Cosmic Rays and nuclear cross sections
Karl-Heinz Kampert
Bergische Universität Wuppertal

Cosmic Ray physics from GeV to ZeV energies has entered a precision era thanks to recent space and ground based experiments and has presented us many surprises about the properties of galactic propagation and the possible detection of dark matter signals in the GeV-TeV domain and about the sources and acceleration of the most energetic cosmic rays up to ZeV energies. However, the (astro)physics that can be extracted from the data is presently limited by the limited precision of nuclear physics cross sections, specifically the production of secondary particles in nuclear interactions, and photonuclear and protodisintegration cross sections. The astrophysical limitations imposed by these uncertainties will be addressed in this presentation and the need for better data be emphasised.