Karlsruhe 2011 – scientific programme
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T: Fachverband Teilchenphysik
T 87: Gammaastronomie I
T 87.6: Talk
Monday, March 28, 2011, 18:05–18:20, 30.41: 104
Solar and atmospheric neutrinos as background for direct dark matter searches — •Achim Gütlein1, Christian Ciemniak1, Franz von Feilitzsch1, Nils Haag1, Martin Hofmann1, Christian Isaila1, Tobias Lachenmaier2, Jean-Côme Lanfranchi1, Lothar Oberauer1, Sebastian Pfister1, Walter Potzel1, Sabine Roth1, Moritz von Sivers1, Raimund Strauß1, and Andreas Zöller1 — 1Technische Universität München, Physik Department E15 — 2Eberhard Karls Universität Tübingen
Most experiments for direct dark matter searches are looking for nuclear recoils induced by WIMPs (Weakly Interacting Massive Particles). The most present experiments are able to discriminate between electron recoils (gammas, betas) and nuclear recoils (WIMPs, neutrons, neutrinos). Thus, it is possible to reject most of the background events (i.e. gammas, betas). However, it is not possible to distinguish between WIMP events and neutrinos scattered coherently off the target nuclei. Thus, solar and atmospheric neutrinos can be a serious background for future experiments for direct dark matter searches. We show our calculated limits for future ton-scale experiments due to solar and atmospheric neutrinos.
This work has been supported by funds of the Deutsche Forschungsgemeinschaft DFG (Transregio 27: Neutrinos and Beyond), the Excellence Cluster (Origin and Structure of the Universe) and the Maier-Leibnitz-Laboratorium (Garching).