tau - Particle Data Group

Citation: K. Nakamura et al. (Particle Data Group), JP G 37, 075021 (2010) and 2011 partial update for the 2012 edition (URL: http://pdg.lbl.gov)
WEIGHTED AVERAGE
85.26±0.13 (Error scaled by 1.6)
Values above of weighted average, error,
and scale factor are based upon the data in
this ideogram only. They are not necessarily
the same as our ‘best’ values,
obtained from a least-squares constrained fit
utilizing measurements of other (related)
quantities as additional information.
ABREU 01M DLPH
χ 2
0.3
ACHARD 01D L3 0.0
ACTON 92H OPAL 4.8
5.1
(Confidence Level = 0.077)
83.5 84 84.5 85 85.5 86 86.5
(
Γ particle − ≥ 0 neutrals ≥ 0K 0 )
ν τ (“1-prong”) /Γ total
Γ ( particle − ≥ 0neutrals ≥ 0K 0 L ν ) τ
/Γtotal Γ 2 /Γ
Γ 2 /Γ = (Γ 3 +Γ 5 +Γ 9 +Γ 10 +Γ 14 +Γ 16 +Γ 20 +Γ 23 +Γ 27 +Γ 28 +Γ 30 +0.6569Γ 35 +
0.6569Γ 37 +0.6569Γ 40 +0.6569Γ 42 +1.0985Γ 47 +0.3139Γ 48 +0.708Γ 126 +
0.715Γ 128 +0.09Γ 150 +0.09Γ 152 )/Γ
VALUE (%) EVTS DOCUMENT ID TECN COMMENT
84.72±0.08 OUR FIT Error includes scale factor of 1.3.
85.1 ±0.4 OUR AVERAGE
•••We use the following data for averages but not for fits. •••
85.6 ±0.6 ±0.3 avg 3300 1 ADEVA 91F L3 E ee
cm =88.3–94.3 GeV
84.9 ±0.4 ±0.3 avg BEHREND 89B CELL E ee cm = 14–47 GeV
84.7 ±0.8 ±0.6 avg 2 AIHARA 87B TPC E ee
cm =29GeV
•••We do not use the following data for averages, fits, limits, etc. •••
86.4 ±0.3 ±0.3 ABACHI 89B HRS E ee cm =29GeV
87.1 ±1.0 ±0.7 3 BURCHAT 87 MRK2 E ee
cm =29GeV
87.2 ±0.5 ±0.8 SCHMIDKE 86 MRK2 E ee cm =29GeV
84.7 ±1.1 +1.6
−1.3
169 4 ALTHOFF 85 TASS E ee
cm = 34.5 GeV
86.1 ±0.5 ±0.9 BARTEL 85F JADE E ee cm = 34.6 GeV
87.8 ±1.3 ±3.9 5 BERGER 85 PLUT E ee
cm = 34.6 GeV
86.7 ±0.3 ±0.6 FERNANDEZ 85 MAC E ee cm =29GeV
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