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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 ∗ (892) 0 K − ) ν τ /Γtotal Γ 115 /Γ<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.21 ±0.04 OUR AVERAGE<br />
0.213±0.048 1 BARATE 98 ALEP 1991–1995 LEP runs<br />
0.20 ±0.05 ±0.04 47 ALBRECHT 95H ARG E ee cm =9.4–10.6 GeV<br />
1 BARATE 98 measure the K − (ρ 0 → π + π − )fractioninτ − → K − π + π − ντ decays<br />
to be (35 ± 11)% and derive this result from their measurement of Γ(τ − →<br />
K − π + π − ν τ )/Γ total assuming the intermediate states are all K − ρ and K − K ∗ (892) 0 .<br />
Γ ( K ∗ (892) 0 π − ) ≥ 0neutralsν τ /Γtotal Γ 116 /Γ<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.38±0.11±0.13 105 GOLDBERG 90 CLEO E ee cm =9.4–10.9 GeV<br />
Γ ( K ∗ (892) 0 π − ) ν τ /Γtotal Γ 117 /Γ<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.22 ±0.05 OUR AVERAGE<br />
0.209±0.058 1 BARATE 98 ALEP 1991–1995 LEP runs<br />
0.25 ±0.10 ±0.05 27 ALBRECHT 95H ARG E ee cm =9.4–10.6 GeV<br />
1 BARATE 98 measure the K − K ∗ (892) 0 fraction in τ − → K − K + π − ντ decays<br />
to be (87 ± 13)% and derive this result from their measurement of Γ(τ − →<br />
K − K + π − ν τ )/Γ total .<br />
Γ ( (K ∗ (892)π ) − ν τ → π − K 0 π 0 ) ν τ /Γtotal Γ 118 /Γ<br />
VALUE (%) DOCUMENT ID TECN COMMENT<br />
0.10 ±0.04 OUR AVERAGE<br />
0.097±0.044±0.036 1 BARATE 99K ALEP 1991–1995 LEP runs<br />
0.106±0.037±0.032 2 BARATE 98E ALEP 1991–1995 LEP runs<br />
1 BARATE 99K measure K 0 ’s by detecting K 0’s in their hadron calorimeter. They determine<br />
the K 0 ρ − fraction in τ − → π − K 0 π 0 ν τ decays to be (0.72 ± 0.12 ± 0.10)<br />
L<br />
and multiply their B(π − K 0 π 0 ν τ ) measurement by one minus this fraction to obtain<br />
the quoted result.<br />
2 BARATE 98E reconstruct K 0 ’s using K 0 → π + π − decays. They determine the K 0 ρ −<br />
S<br />
fraction in τ − → π − K 0 π 0 ν τ decays to be (0.64 ± 0.09 ± 0.10) and multiply their<br />
B(π − K 0 π 0 ν τ ) measurement by one minus this fraction to obtain the quoted result.<br />
Γ ( K 1 (1270) − ) ν τ /Γtotal Γ 119 /Γ<br />
VALUE (%) EVTS DOCUMENT ID TECN COMMENT<br />
0.47±0.11 OUR AVERAGE<br />
0.48±0.11 BARATE 99R ALEP 1991–1995 LEP runs<br />
0.41<br />
−0.35 +0.41 5 1 BAUER 94 TPC E ee<br />
cm =29GeV<br />
1 We multiply 0.41% by 0.25, the relative systematic error quoted by BAUER 94, to obtain<br />
the systematic error.<br />
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