Speaker
Description
Neutrino interactions, though feeble, are tremendously important in particle physics and astrophysics. Yet, at neutrino energies above 350 GeV there has been, up to now, no direct experimental information on neutrino interactions, only predictions. Now, we can measure the neutrino-nucleon cross section above 10 TeV, thanks to the recent discovery of high-energy astrophysical neutrinos by IceCube. The distribution of arrival directions of these neutrinos carries information about their interactions with matter inside the Earth, which we extract. We will show new cross section measurements extracted from the 6-year sample of IceCube High Energy Starting Event showers between 18 TeV and 2 PeV. The measurements agree with standard predictions and show no sign of new physics at these energies.
