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Review of <strong>Particle</strong> Physics: C. Caso et al. (<strong>Particle</strong> <strong>Data</strong> <strong>Group</strong>), European Physical Journal C3, 1 (1998)<br />
45 PERUZZI 77 (MARK-1) measures σ(e + e − → ψ(3770)) × branching fraction to be<br />
0.36 ± 0.10 nb. We use the MARK-3 (ADLER 88C) valueofσ=5.8±0.5±0.6 nb.<br />
WEIGHTED AVERAGE<br />
0.075±0.006 (Error scaled by 1.3)<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 />
0 0.05 0.1 0.15 0.2 0.25<br />
<br />
Γ K − π + π + π −<br />
/Γtotal Γ K − π + π + π− /Γ K − π +<br />
Γ K − π + π + π− /Γ K − π +<br />
Γ K − π + π + π− /Γ K −π +<br />
Γ K − π + π + π− /Γ K −π +<br />
ALBRECHT 94 ARG<br />
χ<br />
0.1<br />
ALBRECHT 94F ARG 1.2<br />
ADLER 88C MRK3 2.0<br />
SCHINDLER 81 MRK2 2.8<br />
PERUZZI 77 MRK1 0.5<br />
2<br />
6.6<br />
(Confidence Level = 0.160)<br />
Γ37/Γ19 Γ37/Γ19 Γ37/Γ19 Γ37/Γ19<br />
VALUE<br />
1.96±0.09 OUR FIT FIT<br />
EVTS DOCUMENT ID TECN COMMENT<br />
2.01±0.13 OUR AVERAGE AVERAGE<br />
1.7 ±0.2 ±0.2 1745 ANJOS 92C E691 γ Be 90–260 GeV<br />
1.90±0.25±0.20 337 ALVAREZ 91B NA14 Photoproduction<br />
2.12±0.16±0.09 BORTOLETTO88 CLEO e + e− 2.0 ±0.9 48 BAILEY 86<br />
10.55 GeV<br />
ACCM π− Be fixed target<br />
2.17±0.28±0.23 ALBRECHT 85F ARG e + e− 10 GeV<br />
2.0 ±1.0 10 BAILEY 83B SPEC π− Be → <strong>D0</strong> 2.2 ±0.8 214 PICCOLO 77 MRK1 e + e− 4.03, 4.41 GeV<br />
Γ K − π + ρ0 total /Γ K − π + π + π− Γ K − π + ρ0 total /Γ K − π + π + π− Γ K − π + ρ0 total /Γ K − π + π + π− Γ K − π + ρ0 total /Γ K − π + π + π− Γ38/Γ37 Γ38/Γ37 Γ38/Γ37 Γ38/Γ37<br />
This includes K− a1 (1260) + , K∗ (892) 0 ρ0 , etc. The next entry gives the specifically<br />
3-body fraction. We rely on the MARK III and E691 full amplitude analyses of the<br />
K− π + π + π− channel for values of the resonant substructure.<br />
VALUE<br />
0.835±0.035 OUR AVERAGE AVERAGE<br />
DOCUMENT ID TECN COMMENT<br />
0.80 ±0.03 ±0.05 ANJOS 92C E691 γ Be 90–260 GeV<br />
0.855±0.032±0.030 COFFMAN 92B MRK3 e + e− 3.77 GeV<br />
•••We do not use the following data for averages, fits, limits, etc. •••<br />
0.98 ±0.12 ±0.10 ALVAREZ 91B NA14 Photoproduction<br />
HTTP://PDG.LBL.GOV Page 21 Created: 6/29/1998 12:22
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