This may be of interest, cheers, Dorothea

----- Forwarded message from s.ando@uva.nl ----- Date: Sun, 27 Oct 2013 18:38:42 +0100 From: Shin'ichiro Ando s.ando@uva.nl Subject: [Grappa] GRAPPA Seminar 28 October: Enrico Borrielo (DESY) To: "grappa@list.uva.nl" grappa@list.uva.nl

Date: 28 October 2013 (Monday) Time: 12:00-13:00 Room: C4.174

Speaker: Enrico Borrielo (DESY)

TITLE: Probing Lorentz Invariance Violation with high-energy astrophysical neutrinos

ABSTRACT: It has been speculated that violations of Lorentz invariance might be generated by quantum-gravity effects. As a consequence, particles may not travel at the universal speed of light. In particular, superluminal extragalactic neutrinos would rapidly lose energy via the bremssthralung of electron-positron pairs, damping their initial energy into electromagnetic cascades, a figure constrained by Fermi Large Area Telescope data. This talk is aimed at showing how the two cascade PeV neutrino events recently detected by IceCube -if attributed to extragalactic diffuse events, as it appears likely- can place the strongest bound on Lorentz-invariance violation in the neutrino sector.

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