tau - Particle Data Group
tau - Particle Data Group 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 − K 0 ) ν τ /Γtotal Γ 37 /Γ VALUE (%) EVTS DOCUMENT ID TECN COMMENT 0.159±0.016 OUR FIT 0.158±0.017 OUR AVERAGE 0.162±0.021±0.011 150 1 BARATE 99K ALEP 1991–1995 LEP runs 0.158±0.042±0.017 46 2 BARATE 98E ALEP 1991–1995 LEP runs 0.151±0.021±0.022 111 COAN 96 CLEO E ee cm ≈ 10.6 GeV •••We do not use the following data for averages, fits, limits, etc. ••• 0.26 ±0.09 ±0.02 13 3 BUSKULIC 96 ALEP Repl. by BARATE 99K 1 BARATE 99K measure K 0 ’s by detecting K 0’s in their hadron calorimeter. L 2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays. S 3 BUSKULIC 96 measure K 0 ’s by detecting K 0’s in their hadron calorimeter. L Γ ( K − K 0 ≥ 0π 0 ) ν τ /Γtotal Γ 38 /Γ = (Γ 37 +Γ 42 )/Γ VALUE (%) EVTS DOCUMENT ID TECN COMMENT 0.318±0.023 OUR FIT 0.330±0.055±0.039 124 ABBIENDI 00C OPAL 1991–1995 LEP runs Γ ( h − K 0 π 0 ) ν τ /Γtotal Γ 39 /Γ = (Γ 40 +Γ 42 )/Γ 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 0.55 ±0.04 OUR FIT 0.50 ±0.06 OUR AVERAGE Error includes scale factor of 1.2. 0.562±0.050±0.048 f&a 264 COAN 96 CLEO E ee cm ≈ 10.6 GeV •••We use the following data for averages but not for fits. ••• 0.446±0.052±0.046 avg 157 1 BARATE 98E ALEP 1991–1995 LEP runs 1 Not independent of BARATE 98E B(τ − → π − K 0 π 0 τ)andB(τ − → K − K 0 π 0 ντ ) values. Γ ( π − K 0 π 0 ) ν τ /Γtotal Γ 40 /Γ 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 0.39 ±0.04 OUR FIT 0.36 ±0.04 OUR AVERAGE 0.347±0.053±0.037 f&a 299 1 BARATE 99K ALEP 1991–1995 LEP runs 0.294±0.073±0.037 f&a 142 2 BARATE 98E ALEP 1991–1995 LEP runs 0.41 ±0.12 ±0.03 f&a 3 ACCIARRI 95F L3 1991–1993 LEP runs •••We use the following data for averages but not for fits. ••• 0.417±0.058±0.044 avg 4 COAN 96 CLEO E ee cm ≈ 10.6 GeV •••We do not use the following data for averages, fits, limits, etc. ••• 0.32 ±0.11 ±0.05 23 5 BUSKULIC 96 ALEP Repl. by BARATE 99K 1 BARATE 99K measure K 0 ’s by detecting K 0’s in their hadron calorimeter. L 2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays. S 4 Not independent of COAN 96 B(h − K 0 π 0 ντ )andB(K − K 0 π 0 ν τ ) measurements. 3 ACCIARRI 95F do not identify π − /K − and assume B(K − K 0 π 0 ντ )=(0.05 ± 0.05)%. 5 BUSKULIC 96 measure K 0 ’s by detecting K 0’s in their hadron calorimeter. L HTTP://PDG.LBL.GOV Page 32 Created: 6/16/2011 12:05
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 L 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 − S 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. L 2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays. S 3 BUSKULIC 96 measure K 0 ’s by detecting K 0’s in their hadron calorimeter. L 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. •••
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Citation: K. Nakamura et al. (<strong>Particle</strong> <strong>Data</strong> <strong>Group</strong>), JP G 37, 075021 (2010) and 2011 partial update for the 2012 edition (URL: http://pdg.lbl.gov)<br />
Γ ( K − K 0 ) ν τ /Γtotal Γ 37 /Γ<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.159±0.016 OUR FIT<br />
0.158±0.017 OUR AVERAGE<br />
0.162±0.021±0.011 150 1 BARATE 99K ALEP 1991–1995 LEP runs<br />
0.158±0.042±0.017 46 2 BARATE 98E ALEP 1991–1995 LEP runs<br />
0.151±0.021±0.022 111 COAN 96 CLEO E ee cm ≈ 10.6 GeV<br />
•••We do not use the following data for averages, fits, limits, etc. •••<br />
0.26 ±0.09 ±0.02 13 3 BUSKULIC 96 ALEP Repl. by BARATE 99K<br />
1 BARATE 99K measure K 0 ’s by detecting K 0’s in their hadron calorimeter.<br />
L<br />
2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays.<br />
S<br />
3 BUSKULIC 96 measure K 0 ’s by detecting K 0’s in their hadron calorimeter.<br />
L<br />
Γ ( K − K 0 ≥ 0π 0 ) ν τ /Γtotal<br />
Γ 38 /Γ = (Γ 37 +Γ 42 )/Γ<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.318±0.023 OUR FIT<br />
0.330±0.055±0.039 124 ABBIENDI 00C OPAL 1991–1995 LEP runs<br />
Γ ( h − K 0 π 0 ) ν τ /Γtotal<br />
Γ 39 /Γ = (Γ 40 +Γ 42 )/Γ<br />
<strong>Data</strong> marked “avg” are highly correlated with data appearing elsewhere in the Listings,<br />
and are therefore used for the average given below but not in the overall fits. “f&a”<br />
marks results used for the fit and the average.<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.55 ±0.04 OUR FIT<br />
0.50 ±0.06 OUR AVERAGE Error includes scale factor of 1.2.<br />
0.562±0.050±0.048 f&a 264 COAN 96 CLEO E ee cm ≈ 10.6 GeV<br />
•••We use the following data for averages but not for fits. •••<br />
0.446±0.052±0.046 avg 157 1 BARATE 98E ALEP 1991–1995 LEP runs<br />
1 Not independent of BARATE 98E B(τ − → π − K 0 π 0 τ)andB(τ − → K − K 0 π 0 ντ )<br />
values.<br />
Γ ( π − K 0 π 0 ) ν τ /Γtotal Γ 40 /Γ<br />
<strong>Data</strong> marked “avg” are highly correlated with data appearing elsewhere in the Listings,<br />
and are therefore used for the average given below but not in the overall fits. “f&a”<br />
marks results used for the fit and the average.<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.39 ±0.04 OUR FIT<br />
0.36 ±0.04 OUR AVERAGE<br />
0.347±0.053±0.037 f&a 299 1 BARATE 99K ALEP 1991–1995 LEP runs<br />
0.294±0.073±0.037 f&a 142 2 BARATE 98E ALEP 1991–1995 LEP runs<br />
0.41 ±0.12 ±0.03 f&a 3 ACCIARRI 95F L3 1991–1993 LEP runs<br />
•••We use the following data for averages but not for fits. •••<br />
0.417±0.058±0.044 avg 4 COAN 96 CLEO E ee<br />
cm ≈ 10.6 GeV<br />
•••We do not use the following data for averages, fits, limits, etc. •••<br />
0.32 ±0.11 ±0.05 23 5 BUSKULIC 96 ALEP Repl. by BARATE 99K<br />
1 BARATE 99K measure K 0 ’s by detecting K 0’s in their hadron calorimeter.<br />
L<br />
2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays.<br />
S<br />
4 Not independent of COAN 96 B(h − K 0 π 0 ντ )andB(K − K 0 π 0 ν τ ) measurements.<br />
3 ACCIARRI 95F do not identify π − /K − and assume B(K − K 0 π 0 ντ )=(0.05 ± 0.05)%.<br />
5 BUSKULIC 96 measure K 0 ’s by detecting K 0’s in their hadron calorimeter.<br />
L<br />
HTTP://PDG.LBL.GOV Page 32 Created: 6/16/2011 12:05