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Possible causes of a rise with energy of the cosmic ray positron fraction
Based on general considerations rather than model-dependent fits to specific scenarios, we argue that an increase with energy of the positron fraction in cosmic rays, suggested by several experiments at E>~10 GeV, most likely requires a primary source of electron-positron pairs. We discuss the po...
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| Lenguaje: | eng |
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2008
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| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.79.021302 http://cds.cern.ch/record/1136631 |
| _version_ | 1780915437588971520 |
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| author | Serpico, Pasquale Dario |
| author_facet | Serpico, Pasquale Dario |
| author_sort | Serpico, Pasquale Dario |
| collection | CERN |
| description | Based on general considerations rather than model-dependent fits to specific scenarios, we argue that an increase with energy of the positron fraction in cosmic rays, suggested by several experiments at E>~10 GeV, most likely requires a primary source of electron-positron pairs. We discuss the possible alternatives, and find none of them plausible on astrophysical or particle physics grounds. Further observational ways to test different scenarios are discussed. |
| id | cern-1136631 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2008 |
| record_format | invenio |
| spelling | cern-11366312023-03-14T16:45:55Zdoi:10.1103/PhysRevD.79.021302http://cds.cern.ch/record/1136631engSerpico, Pasquale DarioPossible causes of a rise with energy of the cosmic ray positron fractionParticle Physics - PhenomenologyBased on general considerations rather than model-dependent fits to specific scenarios, we argue that an increase with energy of the positron fraction in cosmic rays, suggested by several experiments at E>~10 GeV, most likely requires a primary source of electron-positron pairs. We discuss the possible alternatives, and find none of them plausible on astrophysical or particle physics grounds. Further observational ways to test different scenarios are discussed.Based on general considerations rather than model-dependent fits to specific scenarios, we argue that an increase with energy of the positron fraction in cosmic rays, suggested by several experiments at E>~10 GeV, most likely requires a primary source of electron-positron pairs. We discuss the possible alternatives, and find none of them plausible on astrophysical or particle physics grounds. Further observational ways to test different scenarios are discussed.arXiv:0810.4846CERN-PH-TH-2009-007oai:cds.cern.ch:11366312008-10-28 |
| spellingShingle | Particle Physics - Phenomenology Serpico, Pasquale Dario Possible causes of a rise with energy of the cosmic ray positron fraction |
| title | Possible causes of a rise with energy of the cosmic ray positron fraction |
| title_full | Possible causes of a rise with energy of the cosmic ray positron fraction |
| title_fullStr | Possible causes of a rise with energy of the cosmic ray positron fraction |
| title_full_unstemmed | Possible causes of a rise with energy of the cosmic ray positron fraction |
| title_short | Possible causes of a rise with energy of the cosmic ray positron fraction |
| title_sort | possible causes of a rise with energy of the cosmic ray positron fraction |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1103/PhysRevD.79.021302 http://cds.cern.ch/record/1136631 |
| work_keys_str_mv | AT serpicopasqualedario possiblecausesofarisewithenergyofthecosmicraypositronfraction |