Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 52: Neutrino physics without accelerators V

T 52.5: Talk

Wednesday, April 1, 2020, 17:30–17:45, H-HS XIII

Sensitivity of the DARWIN observatory to the neutrinoless double beta decay of 136Xe — •Fabian Kuger for the DARWIN collaboration — Albert-Ludwigs-Universität Freiburg, Deutschland

The DARWIN observatory is a proposed next-generation experiment to search for particle dark matter and other rare processes. It will operate 40t of natural xenon in a time projection chamber, thus containing about 3.6t of ¹³⁶Xe. This renders DARWIN well suited to search for the neutrinoless double beta decay of ¹³⁶Xe, with a science reach compatible to dedicated double beta decay experiments. We show that DARWIN will reach a half-life sensitivity limit of T_1/2^0ν = 2.4 × 10²⁷ yr assuming a rather conservative radio-purity and performance scenario. The impact of more progressive assumptions on the sensitivity limit is discussed. We conclude that after 10 years of operation DARWIN will cover the Majorana mass range corresponding to the inverted hierarchy.