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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).