Würzburg 2018 – scientific programme
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T: Fachverband Teilchenphysik
T 80: Neutrinophysik VIII
T 80.4: Talk
Thursday, March 22, 2018, 17:20–17:35, Z6 - HS 0.001
Combining JUNO and PINGU to determine the neutrino mass hierarchy — •Jan Weldert, Thomas Ehrhardt, Sebastian Lorenz, Michael Wurm, and Sebastian Böser — Johannes Gutenberg-Universität Mainz
The neutrino mass hierarchy (NMH) - i.e., the order of the mass eigenstates ν1,ν2,ν3 - is one of the fundamental open questions in neutrino physics. Both the Jiangmen Underground Neutrino Observatory (JUNO) and the Precision IceCube Next Generation Upgrade (PINGU) will carefully examine the oscillation behavior of neutrinos to determine the NMH. For this purpose, JUNO will measure the energy dependent flux of MeV reactor neutrinos, whereas PINGU specializes in the measurement of the energy and direction dependent flux of GeV atmospheric neutrinos. More precisely, JUNO searches for the NMH via tiny wiggles in the energy spectrum due to the reactor neutrino survival probability in vacuum. PINGU, on the other hand, looks for NMH-dependent oscillation signatures from terrestrial matter effects. The combination of these approaches and the excellent energy resolution of JUNO together with the high statistic of PINGU are expected to yield sensitivity beyond the purely statistical combination because of the different impacts of the mass difference Δ m312 = m32 − m12 in the two experiments. This talk covers the current status of a combined analysis of JUNO and PINGU.