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 1 (1400) − ) ν τ /Γtotal Γ 120 /Γ
VALUE (%) EVTS DOCUMENT ID TECN COMMENT
0.17±0.26 OUR AVERAGE Error includes scale factor of 1.7.
0.05±0.17 BARATE 99R ALEP 1991–1995 LEP runs
0.76
−0.33 +0.40 11 1 BAUER 94 TPC E ee
cm =29GeV
1 We multiply 0.76% by 0.25, the relative systematic error quoted by BAUER 94, to obtain
the systematic error.
[ ( Γ K1 (1270) − ) ( )] ν τ +Γ K1 (1400) − ν τ /Γtotal (Γ 119 +Γ 120 )/Γ
VALUE (%) EVTS DOCUMENT ID TECN COMMENT
1.17+0.41
−0.37 ±0.29 16 1 BAUER 94 TPC E ee
cm =29GeV
1 We multiply 1.17% by 0.25, the relative systematic error quoted by BAUER 94, to obtain
the systematic error. Not independent of BAUER 94 B(K 1 (1270) − ν τ )andBAUER94
B(K 1 (1400) − ν τ ) measurements.
Γ ( K 1 (1270) − ) [ (
ν τ / Γ K1 (1270) − ) ( )]
ν τ +Γ K1 (1400) − ν τ Γ119 /(Γ 119 +Γ 120 )
VALUE DOCUMENT ID TECN COMMENT
0.69±0.15 OUR AVERAGE
0.71±0.16±0.11 1 ABBIENDI 00D OPAL 1990–1995 LEP runs
0.66±0.19±0.13 2 ASNER 00B CLEO E ee
cm =10.6 GeV
1 ABBIENDI 00D assume the resonance structure of τ − → K − π + π − ντ decays is
dominated by the K 1 (1270) − and K 1 (1400) − resonances.
2 ASNER 00B assume the resonance structure of τ − → K − π + π − ντ (ex. K 0 ) decays
is dominated by K 1 (1270) − and K 1 (1400) − resonances.
Γ ( K ∗ (1410) − ) ν τ /Γtotal Γ 121 /Γ
VALUE (units 10 −3 ) DOCUMENT ID TECN COMMENT
1.5 −1.0
+1.4
BARATE 99R ALEP 1991–1995 LEP runs
Γ ( K ∗ )
0 (1430)− ν τ /Γtotal Γ 122 /Γ
VALUE (units 10 −3 ) CL% DOCUMENT ID TECN COMMENT