Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 9: Dunkle Materie 1

T 9.2: Talk

Monday, March 24, 2014, 11:15–11:30, P11

Wavelet analysis as a promising tool to detect the kink-signature of keV-neutrinos in the tritium beta spectrum — •Kai Dolde for the KATRIN collaboration — Karlsruhe Institute of Technology (KIT), Institute for Nuclear Physics (IKP)

The search for viable Dark Matter candidates is a major topic in science nowadays and keV-neutrinos are among the most promising candidates for Warm Dark Matter.
In order to detect keV-neutrinos, the single beta decay of tritium is considered. Since they would contribute with a certain mixing angle to the active neutrinos, they would leave a kink-like signature in the beta energy spectrum.
To analyze and quantify this kink-signature, depending on the keV-neutrino mass and its mixing angle, this talk introduces the Discrete Wavelet Transform as a very promising approach. This multiresolutional analysis method with both time and frequency resolution is shown to be very sensitive to the detection of a kink-like feature caused by keV-neutrinos.

This work was supported by the BMBF under grant no. 05A11VK3, by the Helmholtz Association and the German National Academic Foundation.