The LHC experiments have measured the branching fraction for Z decays to four leptons (electrons or muons). We have combined these measurements with the result B(Z→4)=(4.58±0.26)×10-6, allowing a precise comparison to the standard model prediction of (4.70±0.03)×10-6. We use a minimal extension of the standard model to demonstrate that this combined value may be used to set stringent limits on new physics.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)