Number from ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Colliders

Number of Light ${{\mathit \nu}}$ Types

INSPIRE   JSON  (beta) PDGID:
S007NE
VALUE DOCUMENT ID TECN
$2.9963$ $\pm0.0074$ 1
JANOT
2020
• • We do not use the following data for averages, fits, limits, etc. • •
$2.9918$ $\pm0.0081$ 2
VOUTSINAS
2020
$2.9840$ $\pm0.0082$ 3
LEP-SLC
2006
RVUE
$3.00$ $\pm0.05$ 4
LEP
1992
RVUE
1  JANOT 2020 applies a correction to LEP-SLC 2006 using an updated Bhabha cross section calculation. This result also includes a correction to account for correlated luminosity bias as presented in VOUTSINAS 2020.
2  VOUTSINAS 2020 applies a correction to LEP-SLC 2006 to account for correlated luminosity bias.
3  Combined fit from ALEPH, DELPHI, L3 and OPAL Experiments.
4  Simultaneous fits to all measured cross section data from all four LEP experiments.
References