OUR FIT is obtained using the fit procedure and correlations as determined by the LEP Electroweak Working Group (see the note “The ${{\mathit Z}}$ boson” and ref. LEP-SLC 2006 ). This quantity is defined as

$\sigma{}{}^{0}_{\mathit h}$ = ${12 {{\mathit \pi}} \over \mathit M{}^{2}_{{{\mathit Z}} }}{\Gamma\mathrm {( {{\mathit e}^{+}} {{\mathit e}^{-}} )}~\Gamma\mathrm {({\mathrm {hadrons}})}\over \Gamma {}^{2}_{{{\mathit Z}} }}$

It is one of the parameters used in the ${{\mathit Z}}$ lineshape fit.

VALUE (nb) EVTS DOCUMENT ID TECN  COMMENT $\bf{ 41.541 \pm0.037}$ OUR FIT $41.501$ $\pm0.055$ 4.10M 1 ABBIENDI 2001 A OPAL ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $88 - 94$ GeV $41.578$ $\pm0.069$ 3.70M ABREU 2000 F DLPH ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $88 - 94$ GeV $41.535$ $\pm0.055$ 3.54M ACCIARRI 2000 C L3 ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $88 - 94$ GeV $41.559$ $\pm0.058$ 4.07M 2 BARATE 2000 C ALEP ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $88 - 94$ GeV • • We do not use the following data for averages, fits, limits, etc. • • $42$ $\pm4$ 450 ABRAMS 1989 B MRK2 ${\it{}E}^{\it{}ee}_{\rm{}cm}$= $89.2 - 93.0$ GeV 1  ABBIENDI 2001A error includes approximately 0.031 due to statistics, 0.033 due to event selection systematics, 0.029 due to uncertainty in luminosity measurement, and 0.011 due to LEP energy uncertainty. 2  BARATE 2000C error includes approximately $0.030$ due to statistics, $0.026$ due to experimental systematics, and $0.025$ due to uncertainty in luminosity measurement.

References:

ABBIENDI 2001A EPJ C19 587 Precise Determination of the ${{\mathit Z}}$ Resonance Parameters at LEP: “Zedometry'' ABREU 2000F EPJ C16 371 Cross Sections and Leptonic Forward-Backward Asymmetries from the ${{\mathit Z}^{0}}$ Running of LEP ACCIARRI 2000C EPJ C16 1 Measurements of Cross Sections and Forward Backward Asymmetries at the ${{\mathit Z}}$ Resonance and Determination of Electroweak Parameters BARATE 2000C EPJ C14 1 Measurement of the ${{\mathit Z}}$ Resonance Parameters at LEP ABRAMS 1989B PRL 63 2173 Measurements of ${{\mathit Z}^{0}}$ -Boson Resonance Parameters in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ Annihilation