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Cosmogenic photons as a test of ultra-high energy cosmic ray composition

Abstract:

Although recent measurements of the shower profiles of ultra-high energy cosmic rays suggest that they are largely initiated by heavy nuclei, such conclusions rely on hadronic interaction models which have large uncertainties. We investigate an alternative test of cosmic ray composition which is based on the observation of ultra-high energy photons produced through cosmic ray interactions with diffuse low energy photon backgrounds during intergalactic propagation. We show that if the ultra-hi...

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Publication status:
Published
Peer review status:
Peer reviewed

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
Publisher:
Elsevier
Journal:
Astroparticle Physics More from this journal
Volume:
34
Issue:
6
Pages:
340-343
Publication date:
2011-01-01
DOI:
ISSN:
0927-6505
Keywords:
Pubs id:
pubs:120353
UUID:
uuid:fb2fb238-e8cd-4f94-994a-8824936d6128
Local pid:
pubs:120353
Source identifiers:
120353
Deposit date:
2012-12-19

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