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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 />
WEIGHTED AVERAGE<br />
1.43±0.07 (Error scaled by 2.4)<br />
Values above of weighted average, error,<br />
and scale factor are based upon the data in<br />
this ideogram only. They are not necessarily<br />
the same as our ‘best’ values,<br />
obtained from a least-squares constrained fit<br />
utilizing measurements of other (related)<br />
quantities as additional information.<br />
1 1.2 1.4 1.6 1.8 2 2.2<br />
Γ<br />
(K − K + π − )<br />
ν τ /Γ total (units 10 −3 )<br />
LEE 10 BELL<br />
χ 2<br />
5.7<br />
AUBERT 08 BABR 4.9<br />
BRIERE 03 CLE3 1.3<br />
ABBIENDI 00D OPAL<br />
RICHICHI 99 CLEO<br />
BARATE 98 ALEP<br />
11.8<br />
(Confidence Level = 0.0027)<br />
Γ ( K − K + π − ) ( ν τ /Γ π − π + π − ν τ (ex.K 0 ) ) Γ 93 /Γ 60 =Γ 93 /(Γ 62 +0.017Γ 150 )<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 />
1.60±0.06 OUR FIT Error includes scale factor of 1.9.<br />
1.83±0.05 OUR AVERAGE<br />
1.60±0.15±0.30 f&a 2.3k RICHICHI 99 CLEO E ee cm =10.6 GeV<br />
•••We use the following data for averages but not for fits. •••<br />
1.84±0.01±0.05 avg 108k 1 LEE 10 BELL 666 fb −1 E ee<br />
cm = 10.6 GeV<br />
1 Not independent of LEE 10 Γ(τ − → K − K + π − ντ )/Γ total and Γ(τ − →<br />
π − π + π − ν τ (ex.K 0 ))/Γ total values.<br />
Γ ( K − K + π − π 0 ) ν τ /Γtotal Γ 94 /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 (units 10 −4 ) CL% EVTS DOCUMENT ID TECN COMMENT<br />
0.61±0.25 OUR FIT Error includes scale factor of 1.4.<br />
0.60±0.18 OUR AVERAGE<br />
0.55±0.14±0.12 f&a 48 ARMS 05 CLE3 7.6 fb −1 ,E ee cm =10.6 GeV<br />
7.5 ±2.9 ±1.5 f&a BARATE 98 ALEP 1991–1995 LEP runs<br />
•••We use the following data for averages but not for fits. •••<br />
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