Tag: lepton
A class of elementary particle that includes the electron. Leptons are particles of matter that do not feel the strong force. (See also Particles.)
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The delicate balance of lepton flavours
New ATLAS measurement of lepton flavour universality, a key feature of the Standard Model, in decays of the W boson is more precise than all previous measurements combined
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LHCb brings leptons into line
Simultaneous measurements of rare B-meson decays using the full LHC Run 1 and 2 data samples agree with the predictions of the Standard Model, superseding previous results that had indicated intriguing departures from the 50-year old theory