Fundamental Neutrino Physics with IceCube's 'Deep Core' Sub-array
Professor Douglas Cowen (Pennsylvannia State University)

The low energy reach of the IceCube Neutrino Observatory will be significantly extended with the addition of a sub-array called "Deep Core." Deep Core will be deployed this and next austral summers in the clearest ice at the bottom center of the larger array. It will feature a 10x higher pixel density and 40% higher quantum efficiency photomultiplier tubes. It will also benefit greatly from the use of the surrounding IceCube array as an extremely effective veto against the copious background from downward-going cosmic-ray muons.

In this talk we will show that Deep Core extends the energy reach of IceCube to neutrino energies as low as 5-10 GeV. This will allow IceCube to search for lower mass solar WIMP annihilations, astrophysical neutrino sources in the southern sky, and to measure atmospheric neutrino oscillations. After an overview of IceCube and the design and deployment schedule for Deep Core, we will focus on neutrino oscillations with Deep Core. We will present some early results and predictions showing how well we can measure muon neutrino disappearance, how well we might be able to measure tau neutrino appearance, and whether we have a chance to determine the sign of the neutrino hierarchy.