Speaker
Description
The NνDEx (No Neutrino Double-beta-decay Experiment) is a next-generation experiment designed to search for neutrinoless double-beta (0νββ) decay in ⁸²Se, leveraging a high-pressure gaseous Time Projection Chamber (TPC) as its core detector. Slated for deployment at the China Jinping Underground Laboratory (CJPL) in the future, NνDEx aims to deliver unrivalled performance in low-background, high-sensitivity 0νββ searches by combining two key advantages: the high Q-value of ⁸²Se (2.996 MeV) and the TPC’s intrinsic ability to distinguish signal events from background noise through topological pattern recognition. As Phase-I of the program, the NνDEx-100 prototype is now in advanced research and development, incorporating approximately 100 kg of SeF₆ feedstock. This poster will introduce the foundational physics of 0νββ decay, elaborate on the NνDEx concept, and present the system architecture, background rejection methods, and projected sensitivity estimates for the NνDEx-100 detector.