Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 108: Niederenergie-Neutrinophysik und Suche nach dunkler Materie II

T 108.4: Vortrag

Dienstag, 16. März 2010, 17:30–17:45, HG XI

Coherent neutrino nucleus scattering as background for the dark matter search — •Achim Gütlein, Christian Ciemniak, Franz von Feilitzsch, Christian Isaila, Tobias Lachenmaier, Jean-Côme Lanfranchi, Lothar Oberauer, Sebastian Pfister, Walter Potzel, Sabine Roth, and Andreas Zöller — Technische Universität München, Physik Department, E15

Coherent Neutrino Nucleus Scattering (CNNS) is a neutral current weak interaction and thus flavour independent. Due to the small transferred momenta (< 50 MeV), neutrinos are scattered coherently off all nucleons. The cross section is proportional to the square of the neutron number of the target nuclei.

Several experiments for the direct dark matter search are looking for recoil-nuclei produced by WIMP scattering. In all present experiments for WIMP search it is not posible to decide whether a recoil-nucleus was produced by neutrinos or WIMPS. Solar neutrinos could be a background for the next generation dark-matter experiments.

The results of calculations of the rate of expected neutrino events for direct dark matter search at different threshold energies will be presented.

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).