PerspectivePhysics

The smallest particle collider

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Science  10 Apr 2020:
Vol. 368, Issue 6487, pp. 131
DOI: 10.1126/science.abb3552

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Summary

The standard model of particle physics classifies all elementary particles as fermions or bosons. Fermions, like electrons, avoid each other. Bosons, like photons, can bunch together. The classification rests on a fundamental spin-statistics theorem of quantum field theory and keeps these two types of particles distinct from each other. However, on page 173 of this issue, Bartolomei et al. (1) report an observation of particles that are neither bosons nor fermions.

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