How Strong Is the Strong Force?

Automated excerpt

Harvey Meyer recounts the decades of lattice QCD behind its recent determination to five parts per mille. In QCD, the strength of the force between two quarks, two gluons, or a quark and a gluon is parametrised by the single coupling αs. On the lattice In lattice QCD, quark fields live on the sites of a grid and gluon fields on the links between them.

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