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230 E.3 Lebensdauern und verwandte Konstanten
τ(π ± ) = (2.6033 ± 0.0005) × 10 −8 s (E.16)
τ(π 0 ) = (8.4 ± 0.6) × 10 −17 s (E.17)
τ(K ± ) = (1.2384 ± 0.0024) × 10 −8 s (E.18)
f π := f π + = (130.7 ± 0.1 ± 0.36) MeV (E.19)
f π 0 = 130 ± 5 MeV (E.20)
f K = (159.8 ± 1.4 ± 0.44) MeV (E.21)
|V us | = 0.2200 ± 0.0026 (E.22)