Thu Mar 27 00:00:00 UTC 2025: **Scientists Report on Neutrino Mass and the Search for Majorana Particles**
SEOUL, SOUTH KOREA—March 27, 2025—The AMoRE experiment in South Korea has released findings from its search for neutrinoless double beta decay (0vßß), a rare process that could prove neutrinos are Majorana particles—particles that are their own antiparticles. While the experiment, which used 3 kg of molybdenum-100, did not observe 0vßß, the results provide a new upper limit on neutrino mass.
The research, published in Physical Review Letters, indicates that if 0vßß does occur, the half-life of molybdenum-100 is at least 1024 years. This extremely long half-life suggests the process is exceptionally rare, and may require a larger sample size to detect. The AMoRE team plans to upgrade the experiment to use 100 kg of molybdenum-100 in future research.
The study also placed an upper limit on the mass of neutrinos, estimating it to be less than 0.22-0.65 billionths of a proton’s mass. While this is incredibly small, it is significant because the Standard Model of particle physics predicts neutrinos to be massless. The detection of any mass, however small, would necessitate revisions to this widely accepted model.
The search for Majorana neutrinos is crucial because understanding neutrino properties could provide valuable insight into many unresolved questions about the universe, including the Big Bang and subatomic processes. Neutrinos, the second-most abundant subatomic particle, are notoriously difficult to detect due to their weak interaction with matter.
Meanwhile, Microsoft’s recent announcement of a new quantum computing chip, Majorana 1, which utilizes Majorana particles, has generated both excitement and skepticism within the scientific community. While the long-term potential of this technology is debated, the effort highlights the importance of continued research into the properties of these elusive subatomic particles.
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