URL: https://physikseminar.desy.de/zeuthen/past_colloquia/colloquia_in_2016/october_19_2016/@@siteview
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Mini symposium "The Atmospheric Background to Astrophysical Neutrinos"
Günter Sigl (Uni Hamburg), Sven-Olaf Moch (Uni Hamburg) and Jakob van Santen (DESY Zeuthen)
Seminar room 3, 15:00
Günter Sigl (Uni Hamburg): „Status of cosmic ray spectrum and mass composition and their relevance for neutrino production“.
We summarise the current knowledge on the cosmic ray spectra and composition. We discuss uncertainties due to experimental and hadronic interaction uncertainties and interpretations in terms of astrophysical models, as well as the influence on secondary neutrinos.
Sven-Olaf Moch (Uni Hamburg): „Charm hadroproduction in the atmosphere and neutrino fluxes“.
We present QCD predictions for lepton fluxes from the hadroproduction of charm quarks in the Earth’s atmosphere, provide uncertainty estimates for the lepton fluxes, compare with recent results in the literature and comment on possible constraints from the Large Hadron Collider.
Jakob van Santen DESY Zeuthen (DESY): „Can neutrino telescopes observe atmospheric charm?“
IceCube has claimed the discovery of high-energy extraterrestrial neutrinos, based on an excess of HE neutrinos above known atmospheric backgrounds. The most uncertain background is due to atmospheric neutrinos from charmed meson decay. I will review the flux calculation used in recent IceCube results and discuss the possibility to measure.
