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)
Γ ( K 0 ρ − ) ν τ /Γtotal Γ 41 /Γ
VALUE (%) DOCUMENT ID TECN COMMENT
0.22 ±0.05 OUR AVERAGE
0.250±0.057±0.044 1 BARATE 99K ALEP 1991–1995 LEP runs
0.188±0.054±0.038 2 BARATE 98E ALEP 1991–1995 LEP runs
1 BARATE 99K measure K 0 ’s by detecting K 0’s in hadron calorimeter. They determine
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the K 0 ρ − fraction in τ − → π − K 0 π 0 ν τ decays to be (0.72 ± 0.12 ± 0.10) and
multiply their B(π − K 0 π 0 ν τ ) measurement by this fraction to obtain the quoted result.
2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays. They determine the K 0 ρ −
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fraction in τ − → π − K 0 π 0 ν τ decays to be (0.64 ± 0.09 ± 0.10) and multiply their
B(π − K 0 π 0 ν τ ) measurement by this fraction to obtain the quoted result.
Γ ( K − K 0 π 0 ) ν τ /Γtotal Γ 42 /Γ
VALUE (%) EVTS DOCUMENT ID TECN COMMENT
0.159±0.020 OUR FIT
0.144±0.023 OUR AVERAGE
0.143±0.025±0.015 78 1 BARATE 99K ALEP 1991–1995 LEP runs
0.152±0.076±0.021 15 2 BARATE 98E ALEP 1991–1995 LEP runs
0.145±0.036±0.020 32 COAN 96 CLEO E ee cm ≈ 10.6 GeV
•••We do not use the following data for averages, fits, limits, etc. •••
0.10 ±0.05 ±0.03 5 3 BUSKULIC 96 ALEP Repl. by BARATE 99K
1 BARATE 99K measure K 0 ’s by detecting K 0’s in their hadron calorimeter.
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2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays.
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3 BUSKULIC 96 measure K 0 ’s by detecting K 0’s in their hadron calorimeter.
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Γ ( π − K 0 ≥ 1π 0 ) ν τ /Γtotal
VALUE (%) EVTS DOCUMENT ID TECN COMMENT
Γ 43 /Γ = (Γ 40 +Γ 44 )/Γ
0.324±0.074±0.066 148 ABBIENDI 00C OPAL 1991–1995 LEP runs
Γ ( π − K 0 π 0 π 0 ) ν τ /Γtotal Γ 44 /Γ
VALUE (units 10 −3 ) CL% EVTS DOCUMENT ID TECN COMMENT
0.26±0.24 1 BARATE 99R ALEP 1991–1995 LEP runs
•••We do not use the following data for averages, fits, limits, etc. •••