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)
(10) Γ(τ − → 3h − 2h + ν τ (ex.K 0 ))/Γ total
(11) Γ(τ − → 3h − 2h + π 0 ν τ (ex.K 0 ))/Γ total
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
(2) -34
(3) -47 56
(4) 6 -66 15
(5) -6 38 11 -86
(6) -7 -8 15 0 -2
(7) -2 -1 -5 -3 3 -53
(8) -4 -4 -13 -4 -2 -56 75
(9) -1 -1 -4 3 -6 26 -78 -16
(10) -1 -1 1 0 0 -2 -3 -1 3
(11) 0 0 0 0 0 1 0 -5 5 -57
2 The correlation coefficients between this measurement and the ANASTASSOV 97 measurements
of B(μν μ ν τ ), B(e ν e ν τ ), B(μν μ ν τ )/B(e ν e ν τ ), and B(h − ν τ )/B(e ν e ν τ )
are 0.50, 0.48, 0.07, and 0.63 respectively.
WEIGHTED AVERAGE
11.63±0.12 (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.
11 11.5 12 12.5 13
Γ
(h − )
ν τ /Γ total (%)
Γ ( h − ) (
ν τ /Γ e − )
ν e ν τ
χ 2
ABDALLAH 06A DLPH 0.1
ACKERSTAFF 98M OPAL 2.9
ANASTASSOV 97 CLEO 0.7
3.7
(Confidence Level = 0.155)
Γ 8 /Γ 5 =(Γ 9 +Γ 10 )/Γ 5
Data marked “avg” are highly correlated with data appearing elsewhere in the Listings,
and are therefore used for the average given below but not in the overall fits. “f&a”
marks results used for the fit and the average.
VALUE EVTS DOCUMENT ID TECN COMMENT
0.652 ±0.004 OUR FIT Error includes scale factor of 1.1.
0.640 ±0.007 OUR AVERAGE Error includes scale factor of 1.6.
•••We use the following data for averages but not for fits. •••
HTTP://PDG.LBL.GOV Page 21 Created: 6/16/2011 12:05