${{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$   Decay Mode Summary INSPIRE   PDGID:
S044.16
Mode Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
$\Gamma_{4}$ ${{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ $0.033658$ $\pm0.000023$
Note: ${{\mathit \ell}}$ indicates each type of lepton (${{\mathit e}}$, ${{\mathit \mu}}$, and ${{\mathit \tau}}$), not sum over them.
Note: This parameter is not directly used in the overall fit but is derived using the fit results; see the note “The ${{\mathit Z}}$ boson” and ref. LEP-SLC 2006 (Physics Reports (Physics Letters C) 427 257 (2006)).
The following data is related to the above value:
 ▸ expand all datablocks
$\Gamma($ ${{\mathit Z}}$ $\rightarrow$ hadrons$)/\Gamma($ ${{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ $)$
$\Gamma_{8}/\Gamma_{4}$
$\Gamma($ ${{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$ $)$
$\Gamma_{4}$