Implications of HERA results for very high energy cosmic ray physics

Details Implications of HERA results for very high energy cosmic ray physics Implications of HERA results for very high energy cosmic ray physics

1998-11-13

arxiv.org/abs/astro-ph/9811225v1

Nucl.Phys.Proc.Suppl.75A:62-71,1999

Astronomy and Astrophysics

Astrophysics

LaTeX, 10 pages and 16 figures, invited talk at the Xth Int. Symposium on Very High Energy Cosmic Ray Interactions, Gran Sasso

Scientific paper

10.1016/S0920-5632(99)00216-9

Experimental results obtained with the HERA collider and recent progress in their theoretical interpretation are reviewed. After a short introduction to HERA physics, deep inelastic scattering and photoproduction are discussed as (virtual) photon-proton scattering. It is shown that the measurement and theoretical understanding of both photoproduction as well as low-x deep inelastic scattering are essential for obtaining reliable high energy extrapolations within hadron-hadron interaction models. Limitations of the predictive power of hadron interaction models due to the interplay of perturbative QCD and unitarity effects are discussed.

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