Calibration of the Pierre Auger Observatory with LHC Forward Detectors

Ralf Ulrich (KIT)
DESY Hörsaal, 17:00h

The analysis of cosmic ray data at the highest energies greatly suffers from the limited understanding of hadronic interactions occurring within extensive air shower cascades. For example, it is still not possible to derive reliable and robust measurements of the primary cosmic ray mass composition. However, this is the crucial piece of information that is missing to solve large parts of the cosmic ray puzzle up to the very highest energies. The forward detectors at LHC offer the opportunity to significantly contribute to the improvement of the analysis of cosmic ray data, and thus directly help to find the sources and nature of ultra-high energy cosmic rays. Furthermore, it is a fact that cosmic ray data is sensitive to hadronic interaction physics up to ~400 TeV. Given a very much improved understanding of the nature of cosmic ray data, it is thus possible to extend some hadronic interaction physics measurements up these extreme energies -- far beyond the reach of the LHC.

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