by
Prof.Sebastian Böser(Johannes Gutenberg Universität Mainz)
→
Europe/Berlin
MPI Meeting rooms
MPI Meeting rooms
Description
The observation of neutrino oscillations and the implication that neutrinos have a non-vanishing rest-mass is evidence for physics beyond the standard model of particle physics. However, neither the value of these masses nor their ordering has been firmly established today. While the observation of neutrino oscillations in vacuum only allows to determine the absolute difference of the mass values, secondary effects in propagation through matter give access to the ordering of the mass eigenstates. The low-energy extensions proposed for the IceCube detector at the South Pole are at the forefront of making this measurement. For the absolute value of the mass in the laboratory, tritium end-point spectroscopy is the most sensitive method today. The state-of-the-art experiment KATRIN will provide sensitivity mnu < 200 meV, where it is limited by systematic effects. To overcome these limitations a novel ansatz using Cyclotron Radiation Emission Spectroscopy is pursued by the Project 8 collaboration. I will discuss the working principle of both measurements and the sensitivity that can be achieved.
