Séminaire / Seminar GReCO |
| « TeV-PeV neutrinos over the atmospheric background: originating from two groups of sources? » |
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Haoning He |
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In addition to the two ~1 PeV neutrinos, the IceCube Collaboration recently reported a detection of 26 neutrino candidates at energies from 30 TeV to 250 TeV, implying a confidence level of 4.3 sigma over the atmospheric background. We suggest that these TeV-PeV non-atmospheric neutrinos may originate from two groups of sources, motivated by the non-detection of neutrinos in the energy range a few hundreds TeV- ~1 PeV in current data. We then interpret the current neutrino data with a two-component spectrum model. One has a at spectrum with a cutoff at the energy 250 - 400 TeV and the other has a sharp peak at ~1 PeV. The former is likely via pp collision while the latter may be generated by the photomeson interaction.
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lundi 27 janvier 2014 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |