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Particle physics

A weighty mass difference

The neutron–proton mass difference, one of the most consequential parameters of physics, has now been calculated from fundamental theories. This landmark calculation portends revolutionary progress in nuclear physics.

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References

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Correspondence to Frank Wilczek.

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Wilczek, F. A weighty mass difference. Nature 520, 303–304 (2015). https://doi.org/10.1038/nature14381

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