This may be interesting (taking place tomorrow at the University)

----- Forwarded message from s.ando@uva.nl ----- Date: Sun, 6 Oct 2013 01:46:36 +0200 From: Shin'ichiro Ando s.ando@uva.nl Subject: [Grappa] GRAPPA Seminar on 7 October: Kohta Murase (IAS) To: "grappa@list.uva.nl" grappa@list.uva.nl

Date: 7 October 2013 (Monday) Time: 12:00-13:00 Room: C4.278

Speaker: Kohta Murase (IAS, Princeton)

Title: Unveiling the Origin of High-Energy Neutrinos Observed by IceCube

Abstract: " In 2012, the IceCube collaboration reported two PeV neutrino events. Then, 26 more events were found in a follow-up analysis. Although more statistics are needed to have conclusive evidence, they are likely to include extraterrestrial signals. In this talk, I will try to demystify the origin of this "IceCube excess". The current data suggest that high-energy neutrinos are produced inside astrophysical sources, while it is difficult to explain it with cosmogenic neutrinos. I will also demonstrate the power of the multi-messenger approach. It will be shown that present gamma-ray limits support extragalactic scenarios and further observations can test Galactic neutrino sources. Any viable astrophysical scenario relies on pp or pgamma interaction as a neutrino production mechanism, and discriminating them is also relevant to reveal the sources. In particular, pp scenarios can be tested with multi-messenger data in the next several years. I will discuss future prospects including implications of some specific pgamma scenarios."

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