Journal article
Testing astrophysical models for the PAMELA positron excess with cosmic ray nuclei.
- Abstract:
-
The excess in the positron fraction measured by PAMELA has been interpreted as due to annihilation or decay of dark matter in the Galaxy. More prosaically it has been ascribed to direct production of positrons by nearby pulsars or due to pion production during diffusive shock acceleration of hadronic cosmic rays in nearby sources. We point out that measurements of secondary cosmic ray nuclei can discriminate between these possibilities. New data on the titanium-to-iron ratio support the hadro...
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- Publication status:
- Published
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Bibliographic Details
- Journal:
- Physical Review Letters
- Volume:
- 103
- Issue:
- 8
- Pages:
- 081104
- Publication date:
- 2009-08-01
- DOI:
- EISSN:
-
1079-7114
- ISSN:
-
0031-9007
Item Description
- Language:
- English
- Keywords:
- Pubs id:
-
pubs:8260
- UUID:
-
uuid:3691f8b6-b42d-4f48-b8b2-01b9aa774c81
- Local pid:
- pubs:8260
- Source identifiers:
-
8260
- Deposit date:
- 2012-12-19
Terms of use
- Copyright date:
- 2009
- Notes:
-
4 pages, 2 figures (RevTex4); revised to include additional data in
figures and references; accepted for publication in PRL
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