München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 38: Instrumentation und Anwendungen

HK 38.7: Vortrag

Mittwoch, 22. März 2006, 18:00–18:15, H

Ensembletests and sensitivity calculations for the GERDA experiment using Bayes’ Theorem — •Kevin Kröninger, Iris Abt, Michael Altmann, Allen Caldwell, Daniel Kollar, Xiang Liu, and Bela Majorovits — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, D-80805 München

The application of Bayes’ Theorem on energy spectra as expected for future neutrinoless double beta decay experiments yields a good estimate on signal and background contributions. The GERDA experiment serves as an example. Sets of Monte Carlo ensembles were generated to mimic the data after certain exposures. These ensembles are analyzed using Bayes’ Theorem. The resulting probability density for the signal contribution is either used for the extraction of a signal contribution or to set a limit. A criterion to define the observation of a signal is presented and discussed. The sensitivity range for the GERDA experiment is calculated for different assumptions of the background and the halflife for neutrinoless double beta decay.