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Durham University

Department of Physics

Staff profile

Publication details for Prof Sir Arnold Wolfendale

Wolfendale, AW & Wibig, T (2001). Prospects for extragalactic particles from exotic processes. Journal Of Physics G-nuclear And Particle Physics 27(7): 1625-1631.
  • Publication type: Journal Article
  • ISSN/ISBN: 0954-3899

Author(s) from Durham


Necessary prerequisites for examining the prospects for exotic
processes giving rise to extragalactic particles are the mass
composition and the determination of the cosmic ray energy above which
the majority of the particles are of extragalactic origin. Both aspects
are examined here. It is argued that 3 x 10(18) eV represents the
demarkation energy above which the fraction of extragalactic particles
rises rapidly.
It is also argued that the mass composition remains mixed at the
highest energies. The latter fact, coupled with the less-than-expected
anisotropy of arrival directions, indicates that exotic processes are
not responsible for the extragalactic flux.