Mainz 2014 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 107: Supernova
T 107.2: Vortrag
Donnerstag, 27. März 2014, 17:00–17:15, P11
Detecting the Diffuse Supernova Neutrino Background with the LENA Detector — •Randolph Möllenberg, German Beischler, Dominikus Hellgartner, Timo Lewke, Lothar Oberauer, Patrick Pfahler, Tobias Stempfle, Marc Tippmann, Jürgen Winter, and Vincenz Zimmer — for the LAGUNA-LENA working group — Technische Universität München, Physik Department E15, James Franck Straße, 85748 Garching
The Diffuse Supernova Neutrino Background (DSNB) was created by the cumulative neutrino emission of core-collapse supernovae throughout the history of the universe. Up to now, the DSNB was not detected and the current limit was set to 3.1 νe cm−2s−1 (90 % C.L.; Eνe>17.3 MeV) by the Super-Kamiokande experiment. Depending on the mean supernova neutrino energy, about 80 to 150 events per 10 y are expected in the proposed 50 kt LENA detector. Assuming that the expected value of the background rate is known with 5 % uncertainty, the DSNB can be detected with more than 3 σ significance after 10 y of data taking. In case that no DSNB signal is found with LENA, all current standard DSNB models would be ruled out with more than 90 % C.L.
This research was supported by the Maier-Leibniz-Laboratorium and by the DFG cluster of excellence ’Origin and Structure of the Universe’.