Neutrino mass hierarchy determination with IceCube-PINGU
We discuss the neutrino mass hierarchy determination with atmospheric neutrinos in PINGU (\Precision IceCube Next Generation Upgrade"), based on a simulation with the GLoBES software including the full three avor framework and parameter degeneracy, and we compare it to long-baseline experiment options. We demonstrate that the atmospheric mass hierarchy sensitivity depends on the achievable experiment properties and we identify the main targets for optimization, whereas the impact of a large number of tested systematical errors turns out to be small. Depending on the values of 23, , and the true hierarchy, a 90%CL to 3 discovery after three years of operation seems conceivable. We also emphasize the synergy with existing beam and reactor experiments, driven by NO A, such as the complementary coverage of the parameter space. Finally, we point out that a low intensity neutrino beam with a relatively short decay pipe could be used to determine the mass hierarchy with a sensitivity comparable to the LBNE experiment irrespective of the directional resolution of the detector.