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The mass table on page 1 gives the charged-pion rest energy $139.57039$ MeV, useful for converting a pion's total energy into its momentum.

Equation (72.1), page 1, gives the leading leptonic pseudoscalar decay width, including the decay constant, quark-mixing element and helicity and threshold factors.

Page 1, equation (1), distinguishes the total invisible Z boson width from the partial width of a single active neutrino species. It defines the effective neutrino count through the ratio of these quantities.