Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 101: Niederenergie-Neutrinophysik 3
T 101.2: Vortrag
Dienstag, 5. März 2013, 17:05–17:20, WIL-A317
Testing the MSW-LMA oscillation model with the LENA detector — •Randolph Möllenberg, Simon Appel, German Beischler, Dominikus Hellgartner, Timo Lewke, Quirin Meindl, Lothar Oberauer, Patrick Pfahler, Ludwig Prade, Marc Tippmann, Jürgen Winter, and Vincenz Zimmer — for the LAGUNA-LENA working group — Technische Universität München, Physik Department E15, James Franck Straße, 85748 Garching
Up to now, the solar electron neutrino survival probability was only measured in energy regions, where the neutrino oscillations are either vacuum (Eν<1 MeV) or matter dominated (Eν>3.2 MeV). With the proposed 50 kt LENA detector, a high statistic measurement of the 8B-νe flux down to ∼ 2 MeV is possible. Non standard neutrino interactions could influence Pee in the transition region between vacuum and matter dominated neutrino oscillations. Thus, a detailed GEANT4 based Monte Carlo study was performed, to analyze how precise the MSW-LMA solution can be tested with LENA. As there are several models for non standard neutrino interactions, a simple test model with constant Pee was used, to see how efficient this model can be discriminated from the MSW-LMA solution. Using the elastic neutrino electron scattering channel and the charged current reaction of νe on 13C (νe+ 13C → 13N + e−), the constant Pee scenario can be excluded with 5 σ significance after 7 years measuring time.
This research was supported by the Maier-Leibniz-Laboratorium and by the DFG cluster of excellence ’Origin and Structure of the Universe’.