Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 29: Neutrino physics 3
T 29.3: Talk
Tuesday, March 5, 2024, 16:30–16:45, Geb. 20.30: 2.058
Search for Neutrinoless Double Beta Plus Decays with NuDoubt++ — Manuel Böhles1, Sebastian Böser1, Magdalena Eisenhuth1, Cloé Girard-Carillo1, Bastian Keßler1, Kyra Mossel1, •Stefan Schoppmann2, Alfons Weber1, and Michael Wurm1 for the NuDoubt collaboration — 1Johannes Gutenberg-Universität Mainz, Institut für Physik, 55128 Mainz, Germany — 2Johannes Gutenberg-Universität Mainz, Detektorlabor, Exzellenzcluster PRISMA+, 55128 Mainz, Germany
The discovery of neutrino oscillations two decades ago opens the possibility for new physics as to the origin of their masses. Due to their lack of electrical charge, neutrinos could carry Majorana masses causing lepton number violation. This phenomenon could be discovered in neutrinoless double beta decays, where the participating neutrinos are exchanged only internally.
Until now, searches for neutrinoless double beta decays concentrated on double electron emission. With the recent advancement of novel scintillator types capable of unprecedented particle discrimination, the measurement of double positron emission comes into reach.
In this presentation, we introduce NuDoubt++, which is going to use loaded hybrid opaque scintillator to search for double positron emission. We present its advanced particle discrimination capabilities based on topological features of energy depositions and ratios of Cherenkov and scintillation light. Moreover, we illustrate its loading techniques, as well as novel highly effective light readout.
Keywords: neutrino; lepton number violation; scintillation detectors; double beta decays