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Fermilab Experiment Disproves Fourth Neutrino Flavor

2/27/2025

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Summary

Story summary

In a groundbreaking experiment, the NOvA Collaboration at Fermilab, Illinois, has ruled out the existence of a fourth sterile neutrino flavor. This pivotal finding sharpens the limits on sterile neutrinos and challenges earlier suggestions from LSND and MiniBooNE, reinforcing the validity of the established model of three active neutrinos.

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Story summary

In a groundbreaking experiment, the NOvA Collaboration at Fermilab, Illinois, has ruled out the existence of a fourth sterile neutrino flavor. This pivotal finding sharpens the limits on sterile neutrinos and challenges earlier suggestions from LSND and MiniBooNE, reinforcing the validity of the established model of three active neutrinos.