![]() It also provides new constraints on the origin of the disagreements between data and models. The result does so by providing a new reference energy spectrum. ![]() The new result from the PROSPECT Collaboration directly addresses these inconsistencies. These reactor-based experiments have detected fewer neutrinos than expected and found inconsistencies in a small region of the energy spectrum. Suggestions for physics that are not explained by the Standard Model have originated from disagreements between predictions based on the model and data from experiments. This is the theory describing the interactions between all the fundamental particles in the universe. Scientists are interested in the properties of the neutrino because they provide a direct test of the Standard Model of particle physics. ![]() These results provide scientists with new information about the nature of these particles. Now the PROSPECT research collaboration has reported the most precise measurement ever of the energy spectrum of antineutrinos emitted from the fission of uranium-235 (U-235). Researchers designed the Precision Reactor Oscillation and Spectrum Experiment (PROSPECT) for detailed studies of electron antineutrinos coming from the core of the High Flux Isotope Reactor (HFIR). The strongest emitters of neutrinos on Earth-nuclear reactors-play a key role in studying these particles. That makes precision studies of the neutrino and its antimatter partner, the antineutrino, a challenge. The neutrino, one of nature’s most elusive and least understood subatomic particles, rarely interacts with matter.
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