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
9.44±0.14 (Error scaled by 1.4)
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.
8.5 9 9.5 10 10.5 11
(
Γ h − h − h + ν τ (ex.K 0 )
) /Γ total (%)
ABDALLAH 06A DLPH
χ 2
1.0
AKERS 95Y OPAL 2.8
BALEST 95C CLEO 0.1
3.9
(Confidence Level = 0.145)
Γ ( h − h − h + ν τ (ex.K 0 ) ) /Γ ( h − h − h + ≥ 0neutralsν τ (ex. K 0 S → π+ π − )
(“3-prong”) ) Γ 57 /Γ 55
Γ 57 /Γ 55 =(Γ 62 +Γ 85 +Γ 93 +0.017Γ 150 )/(Γ 62 +Γ 70 +Γ 77 +Γ 78 +Γ 85 +Γ 89 +Γ 93 +
Γ 94 +0.285Γ 126 +0.285Γ 128 +0.9101Γ 150 +0.9101Γ 152 )
VALUE DOCUMENT ID TECN COMMENT
0.6496±0.0034 OUR FIT Error includes scale factor of 1.1.
0.660 ±0.004 ±0.014 AKERS 95Y OPAL 1991–1994 LEP runs
Γ ( h − h − h + ν τ (ex.K 0 ,ω) ) /Γ total
VALUE (%)
DOCUMENT ID
9.43±0.06 OUR FIT Error includes scale factor of 1.2.
Γ 58 /Γ = (Γ 62 +Γ 85 +Γ 93 )/Γ
Γ ( π − π + π − ) ν τ /Γtotal
VALUE (%)
DOCUMENT ID
9.31±0.06 OUR FIT Error includes scale factor of 1.2.
Γ ( π − π + π − ν τ (ex.K 0 ) ) /Γ total
Γ 59 /Γ = (0.3431Γ 35 +Γ 62 +0.017Γ 150 )/Γ
Γ 60 /Γ = (Γ 62 +0.017Γ 150 )/Γ
VALUE (%) EVTS DOCUMENT ID TECN COMMENT
9.02±0.06 OUR FIT Error includes scale factor of 1.2.
8.77±0.13 OUR AVERAGE Error includes scale factor of 1.1.
8.42±0.00 +0.26
−0.25
8.9M 1 LEE 10 BELL 666 fb −1 E ee
cm = 10.6 GeV
8.83±0.01±0.13 1.6M 2 AUBERT 08 BABR 342 fb −1 E ee
cm = 10.6 GeV
9.13±0.05±0.46 43k 3 BRIERE 03 CLE3 E ee
cm = 10.6 GeV
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