Göttingen 2025 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 16: Neutrino Physics I

T 16.4: Vortrag

Montag, 31. März 2025, 17:30–17:45, VG 3.103

Event Classification for the Hybrid Opaque Scintillator Experiment NuDoubt⁺⁺ — •Kyra Mossel for the NuDoubt collaboration — Johannes Gutenberg-Universität Mainz, Institut für Physik, 55128 Mainz, Germany

Neutrinoless double beta decay is a hypothetical nuclear process assuming that could occur if the neutrino is its own antiparticle. In this process, two neutrons (protons) decay into two protons (neutrons), emitting two electrons (positrons) but no neutrinos, thereby violating lepton number conservation and demonstrating the Majorana nature of the neutrino. Detecting this extremely rare decay requires exceptionally low background levels and reliable particle identification mechanisms.

The NuDoubt⁺⁺ experiment, designed to study double beta plus decays, addresses this challenge using a novel hybrid and opaque scintillator which is permeated by a fine grid of optical fibers. This setup utilizes both the topology of energy deposits and the ratio of Cherenkov to scintillation light to enhance background discrimination and particle identification.

This presentation focuses on the Cherenkov-to-scintillation light ratio as a tool for background discrimination. The expected photon arrival time distributions for different background event types are shown as well as the experiment’s anticipated performance to distinguish them from signal events.

Keywords: Double Beta Decay; Particle ID; Scintillator; Cherenkov light