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T: Fachverband Teilchenphysik

T 10: Niederenergie Neutrinophysik I

T 10.1: Gruppenbericht

Montag, 9. März 2015, 14:00–14:20, I.12.01 (HS 30)

The COBRA Experiment - Status and Prospects — •Stefan Zatschler for the COBRA collaboration — TU Dresden, Institut für Kern- und Teilchenphysik, 01069 Dresden, D

COBRA is a next-generation experiment searching for the existence of neutrinoless double beta (0νββ) decay to clarify the nature of neutrinos as either Dirac or Majorana particle. Furthermore, the study of 0νββ-decay allows for the identification of the neutrino mass hierarchy realized in nature and the determination of the effective Majorana neutrino mass in case of a signal.

Currently a demonstrator setup built of 64 coplanar grid (CPG) detectors collects high quality low background physics data at the underground facility LNGS (Italy) with FADC pulse shape sampling. The detectors are made of CdZnTe, which is a commercially available room temperature semiconductor containing several double beta isotopes. The main isotope of interest is Cd-116 with a Q-value of 2813.5 keV well above the highest naturally occurring gamma lines.

In this talk an overview of the experimental status and recent developments in the analysis of data from the LNGS detector array will be presented as well as newly developed techniques to reduce background via pulse shape analysis (PSA). Additionally, future prospects towards a large-scale setup will be discussed.