Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 108: Neutrinophysik 9 (sterile Neutrinos)
T 108.3: Vortrag
Donnerstag, 30. März 2017, 17:25–17:40, VSH 118
Sterile neutrino search at the keV mass scale with TRISTAN — Tobias Bode1, Tim Brunst1, Kai Dolde2, Ellen Förstner3, Anton Huber3, Felix Knapp3, Marc Korzeczek3, Thierry Lasserre4, Susanne Mertens1, David Radford5, and •Martin Slezák1 for the KATRIN collaboration — 1Max Planck Institute for Physics, München, Germany — 2University of Heidelberg, Germany — 3Karlsruhe Institute of Technology, Germany — 4Saclay Nuclear Research Center, France — 5Oak Ridge National Laboratory, USA
Almost all experimental results in neutrino physics are consistent with the picture of three active weakly-interacting neutrinos. Nevertheless, several neutrino oscillation experiments and some cosmological observations indicate a possible existence of additional sterile neutrino states. The TRISTAN project is a planned modification of the KATRIN experiment that will allow to extend the physics reach to search for a keV-scale, mostly sterile, neutrino mass state. The signature of a such a state would be a miniscule kink-like distortion of the tritium beta-spectrum. Precise modelling and understanding of the spectrum over the whole energy range is required to reach the necessary experimental sensitivity needed for observation of such a distortion. In this talk, the project and in particular new analysis and modeling approaches will be presented.