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New physics from ultrahigh energy cosmic rays

Abstract:
Observations of cosmic rays with energies above ~ 4 x 10^{10} GeV have inspired several speculative suggestions concerning their origin. The crucial question is whether or not the spectrum exhibits the expected `GZK cutoff' at this energy -- concerning which there are presently contradictory results. If there is indeed a cutoff, then the sources are cosmologically distant and rather exotic in nature. If there is no cutoff then new physics is required.
Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
Journal:
Acta Phys.Polon.B
Volume:
35
Issue:
1
Pages:
351-364
Publication date:
2003-12-16
ISSN:
0587-4254
Source identifiers:
180126
Language:
English
Keywords:
Pubs id:
pubs:180126
UUID:
uuid:0acd81c5-ff10-46d7-b94c-613be931f6c9
Local pid:
pubs:180126
Deposit date:
2012-12-19

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