Updates of Semileptonic Results for the Summer 2003
The changes of this update with respect to the status of winter 2003
are described here.
All analyses are rescaled to a common set of input parameters defined
in common.param.
A spreadsheet with the breakdowns of the errors can be found as xls
and gnumeric.
nada
Exclusive Branching Fraction: B0 -> D*lnu
Experiment |
BF (rescaled) |
Parameters |
Remarks |
ALEPH |
5.93 +/- 0.26 +/- 0.39 |
input parameters
| Phys.Lett.B395:373-,1997 |
OPAL (excl) |
5.59 +/- 0.19 +/- 0.42 |
input parameters |
Phys.Lett.B482:15-,2000, exclusive reco. |
OPAL (partial reco) |
6.31 +/- 0.27 +/- 0.60 |
input parameters |
Phys.Lett.B482:15-,2000, partial reco. |
DELPHI (partial reco) |
5.15 +/- 0.13 +/- 0.37 |
input parameters
| Phys.Lett.B510:55-,2001, partial reco. |
BELLE |
4.78 +/- 0.23 +/- 0.43 |
input parameters
| Phys.Lett.B526:247-,2002 |
CLEO |
6.22 +/- 0.19 +/- 0.39 |
input parameters
| Phys.Rev.Lett.89:081803,2002 |
BABAR |
4.89 +/- 0.03 +/- 0.29 |
input parameters |
preliminary |
DELPHI (excl) |
5.84 +/- 0.20 +/- 0.43 |
input parameters |
preliminary, exclusive reco. |
Average |
5.33 +/- 0.20 |
chi2/dof = 14.1/7 (CL = 0.049) |
eps gif |
nada
Exclusive Branching Fraction: B0 -> Dlnu
Experiment |
BF (rescaled) |
Parameters |
Remarks |
ALEPH |
2.42 +/- 0.20+/- 0.50 |
input parameters |
Phys.Lett.B395:373-,1997 |
CLEO |
2.11+/- 0.13+/- 0.17 |
input parameters |
Phys.Rev.Lett.82:3746-,1999 |
BELLE |
2.20+/- 0.12+/- 0.39 |
input parameters |
Phys.Lett.B526:258-268,2002 |
Average
| 2.14+/- 0.20
| chi2/dof = 0.3/2 (CL = 0.840)
| eps gif |
nada
Inclusive Semileptonic Branching Fraction for B+/B0 Admixture: B -> Xlnu
Experiment |
Rescaled Value |
Input |
Remarks |
ARGUS |
09.73 +/- 0.50 +/- 0.39 |
input parameters
| Phys. Lett. B318:397, 1993, e-tag |
BABAR (breco) |
10.40 +/- 0.50 +/- 0.46 |
input parameters
| preliminary, hep-ex/0204001, breco |
BELLE (l tag) |
10.94 +/- 0.12 +/- 0.50 |
input parameters
| Phys.Lett.B547:181, 2002, e-tag |
BABAR (e tag) |
10.89 +/- 0.18 +/- 0.29 |
input parameters
| Phys. Rev. D67:031101, 2003, e-tag |
BELLE (breco) |
11.19 +/- 0.20 +/- 0.31 |
input parameters
| breco-tag, preliminary |
CLEO (l tag, 2003) |
10.88 +/- 0.08 +/- 0.30 |
input parameters
| e-tag, preliminary, superceedes PRL 76:1570 (1996) |
Average |
10.89 +/- 0.23 |
chi2/dof = 5.1/5 (CL = 0.410) |
eps gif |
In hep-ex/0212036, the LEP HF steering group quotes BF(B ->
Xlnu) = 10.65 +/- 0.23 at LEP. This result is model-dependent in
the sense that its error includes a contribution of 0.14 for the
modeling of b->Xl.
Exclusive |Vcb| F(1)
This table and the plots in the last row document the two-dimensional
simultaneous fit to |Vcb|*F(1) and rho^2.
Experiment |
|Vcb| F(1) (rescaled) |
rho2 (rescaled) |
Correlation (stat/syst/total) |
Parameters |
Remarks |
ALEPH |
34.0 +/- 2.1 +/- 1.6 |
0.75 +/- 0.25 +/- 0.37 |
0.94/0.59/0.71 |
input parameters
| Phys.Lett.B395:373-,1997 |
OPAL (partial reco) |
38.9 +/- 1.2 +/- 2.5 |
1.25 +/- 0.14 +/- 0.39 |
0.77/0.69/0.70 |
input parameters
| Phys.Lett.B482:15-,2000 |
OPAL (excl) |
39.6 +/- 1.6 +/- 1.9 |
1.49 +/- 0.21 +/- 0.26 |
0.95/0.43/0.64 |
input parameters
| Phys.Lett.B482:15-,2000 |
DELPHI (partial reco) |
37.4 +/- 1.4 +/- 2.5 |
1.52 +/- 0.14 +/- 0.37 |
0.94/0.76/0.78 |
input parameters
| Phys.Lett.B510:55-,2001 |
BELLE |
36.6 +/-1.9 +/- 1.9 |
1.45 +/- 0.16 +/- 0.20 |
0.91/0.67/0.77 |
input parameters
| Phys.Lett.B526:247-,2002 |
CLEO |
43.6 +/- 1.3 +/- 1.8 |
1.61 +/- 0.09 +/- 0.21 |
0.87/0.62/0.67 |
input parameters
| Phys.Rev.Lett.89:081803,2002 |
DELPHI (excl) |
39.0 +/- 1.8 +/- 2.1 |
1.32 +/- 0.15 +/- 0.33 |
0.89/0.24/0.40 |
input parameters
| preliminary |
Average |
38.6 +/- 1.1 |
1.58 +/- 0.15 |
0.88/0.49/0.55 |
chi2/dof = 22.8/12 (CL = 0.029) |
eps 1 gif 1
eps 2 gif 2 |
With F(1) = 0.91 +/- 0.04, this yields |Vcb| = (42.4
+/-1.2exp +/- 1.9theo)10-3
nada
Exclusive |Vcb|G(1)
Experiment |
|Vcb| G(1) (rescaled) |
rho2 (rescaled) |
Correlation (stat/syst/total) |
Parameters |
Remarks |
ALEPH |
40.5+/- 10.0+/- 6.5 |
1.02+/- 0.98+/- 0.37 |
0.98/0.99/0.96 |
input parameters |
Phys.Lett.B395:373-,1997 |
CLEO |
44.6+/- 5.8+/- 3.5 |
1.27+/- 0.25+/- 0.14 |
0.95/0.98/0.96 |
input parameters |
Phys.Rev.Lett.82:3746-,1999 |
BELLE |
41.8+/- 4.4 +/- 5.2 |
1.12+/- 0.22+/- 0.14 |
0.96/0.96/0.92 |
input parameters |
Phys.Lett.B526:258-268,2002 |
Average |
42.4+/- 3.7 |
1.17+/- 0.16 |
0.93/0.91/0.90 |
chi2/dof = 0.2/4 (CL = 0.99) |
eps 1 gif 1
eps 2 gif 2
|
nada
|Vub| in inclusive semileptonic B decays
Experiment |
Rescaled Value |
Parameters |
Remarks |
ALEPH |
4.12 +/- 0.67 +/- 0.76 |
|
neural net |
L3 |
5.70 +/- 1.00 +/- 1.40 |
|
cut and count |
DELPHI |
4.07 +/- 0.65 +/- 0.61 |
|
mX |
OPAL |
4.00 +/- 0.71 +/- 0.71 |
|
neural net |
LEP Average |
4.09 +/- 0.37 +/- 0.56 |
|
|
CLEO (endpoint) |
4.08 +/- 0.22 +/- 0.61 |
|
2.2 < p < 2.6 |
BABAR (endpoint) |
4.43 +/- 0.26 +/- 0.67 |
|
2.3 < p < 2.6 |
CLEO (m_{ X} - Q^{2}) |
4.05 +/- 0.61 +/- 0.65 |
|
mX - Q2 |
BELLE (m_{ X} with D^{*}l#nu tag) |
5.00 +/- 0.64 +/- 0.53 |
|
mX with D*lnu tag |
BELLE (m_{ X} - Q^{2}) |
3.96 +/- 0.47 +/- 0.52 |
|
mX |
BABAR (m_{ X}) |
4.62 +/- 0.38 +/- 0.49 |
|
mX |
No combination |
|
|
eps gif |
Last update: 07/15/03 (UL)