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Department of Physics

Staff profile

Publication details for Prof Sir Arnold Wolfendale

Erlykin, AD & Wolfendale, AW (2003). How should we modify the high energy interaction models? Nuclear Physics B-proceedings Supplements 122: 368-371.
  • Publication type: Journal Article
  • ISSN/ISBN: 0920-5632

Author(s) from Durham


An analysis has been made of the present situation with respect to the
high energy hadron-nucleus and nucleus-nucleus interaction models as
applied to cosmic rays. As is already known, there are inconsistencies
in the interpretation of experimental data on the primary mass
composition, which appear when different EAS components are used for
the analyses, even for the same experiment. In the absence of obvious
experimental defects, there is a clear need for an improvement to the
existing models; we argue that the most promising way is to enlist two
effects which should be present in nucleus-nucleus collisions but have
not been allowed for before. These are: a few percent energy transfer
into the EAS electromagnetic component due to electron-positron pair
production or electromagnetic radiation of the quark-gluon plasma and a
small slow-down of the cascading process in its initial stages
associated with the extended lifetime of excited nuclear fragments. The
latter process displaces the shower maximum deeper into the atmosphere.