Neutrino Portal to the Dark Sector

Who: John F. Cherry (Los Alamos National Lab)
When: Tuesday, June 10, 2014 at 11:15
Where: The CP³ meeting room

The recent release of high energy neutrino event data from the IceCube experiment is remarkable for the significant excess of neutrino events above the expected background and for the conspicuous absence of events above 3 PeV given the measured neutrino flux below that energy. We show that the absence of IceCube neutrino events at high energies can be explained by resonant down scattering of high energy neutrinos on the cosmic neutrino background via a MeV-scale boson. This mechanism is of particular interest because the IceCube data places constraints on (or possibly detect with further observation) boson mediated neutrino-dark matter (ν-DM) and dark matter-dark matter interactions which may resolve several several small-scale-structure problems.