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Keyword：nuclear physics
Swiss PSI Ultracold Neutron Experiment Finds No Signs of "Mirror World" Oscillation
The Paul Scherrer Institute (PSI) in Switzerland announced on July 28 that its researchers detected approximately 25 billion neutrons in an ultracold neutron experiment and found no signs of neutrons spontaneously transforming into mirror neutrons. The results constrain, with high certainty, the theoretical possibility of neutrons disappearing into the so-called mirror world. The mirror world hypothesis posits that every elementary particle in the real world may have a corresponding mirror particle, such as mirror electrons, mirror protons, and mirror neutrons. Such particles interact extremely weakly with ordinary matter, potentially connecting primarily through gravity or rare oscillations of neutral particles, and have therefore also been considered as dark matter candidates...
2026-08-03
German Science and Humanities Council Supports German Participation in the LEGEND-1000 Neutrinoless Double Beta Decay Experiment
On July 27, 2026, the German Science and Humanities Council expressed its support for German participation in the LEGEND-1000 experiment. The project had previously passed scientific evaluation and was deemed significant for a broad research community in the fields of particle physics and nuclear physics. LEGEND-1000 is the next phase of the large-scale enriched germanium neutrinoless double β decay experiment, planned to be constructed by an international collaborative team at the underground laboratory of the Gran Sasso National Laboratory in Italy. German participating institutions include the Max Planck Institute for Nuclear Physics in Heidelberg and the Technical University of Munich, with project leaders being Professor Susanne Mertens and Professor Stefan Schönert, respectively. According to the project...
2026-08-03