The fit uses all public moment measurements of the hadronic mass and lepton energy distributions in B -> Xclnu and photon energy distribution in B -> Xsgamma decays where correlation matrices are available. It follows closely the approach of Phys.Rev. D78 (2008) 032016.
It is based on calculations in Eur.Phys.J. C34 (2004) 181-189 and Nucl.Phys. B710 (2005) 371-401. Theoretical errors concerning the accuracy in the expression for a given moment have been assigned following the recipes given by the authors of the above publications.
Input | |Vcb| (10-3) | mbkin (GeV) | mu2pi (GeV2) | chi2/ndf. | |
---|---|---|---|---|---|
all moments (Xclnu and Xsgamma) | 41.67 +/- 0.43(fit) +/- 0.08(tauB) +/- 0.58(th) | 4.601 +/- 0.034 | 0.440 +/- 0.040 | details | 29.7 / (64-7) |
Xclnu only | 41.48 +/- 0.47(fit) +/- 0.08(tauB) +/- 0.58(th) | 4.659 +/- 0.049 | 0.428 +/- 0.044 | details | 24.1 / (53-7) |
Figures of the Delta chi2=1 ellipses can be found here:
We consider two data samples for the fit (Table 1), using:
Experiment | Hadron moments | Lepton moments | Photon moments | References |
---|---|---|---|---|
BaBar | n=2 c=0.9,1.1,1.3,1.5 n=4 c=0.8,1.0,1.2,1.4 [1] |
n=0 c=0.6,1.2,1.5 n=1 c=0.6,0.8,1.0,1.2,1.5 n=2 c=0.6,1.0,1.5 n=3 c=0.8,1.2 [2] |
n=1 c=1.9,2.0 n=2 c=1.9 [3,4] |
[1]
arXiv:0707.2670 [2] Phys.Rev. D69 (2004) 111104 [3] Phys.Rev. D72 (2005) 052004 [4] Phys. Rev. Lett. 97, 171803 (2006) |
Belle | n=2 c=0.7,1.1,1.3,1.5 n=4 c=0.7,0.9,1.3 [5] |
n=0 c=0.6,1.0,1.4 n=1 c=0.6,0.8,1.0,1.2,1.4 n=2 c=0.6,1.0,1.4 n=3 c=0.8,1.0, 1.2 [6] |
n=1 c=1.8,1.9 n=2 c=1.8,2.0 [7] |
[5]
Phys.Rev. D75 (2007) 032005 [6] Phys.Rev. D75 (2007) 032001 [7] arXiv:0804.1580 |
CDF | n=2 c=0.7 n=4 c=0.7 [8] |
. | . | [8] Phys.Rev. D71 (2005) 051103 |
CLEO | n=2 c=1.0,1.5 n=4 c=1.0,1.5 [9] |
. | n=1 c=2.0 [10] | [9]
Phys.Rev. D70 (2004) 032002 [10] Phys.Rev.Lett. 87 (2001) 251807 |
DELPHI | n=2 c=0.0 n=4 c=0.0 [11] |
n=1 c=0.0 n=2 c=0.0 n=3 c=0.0 [11] |
. | [11] Eur.Phys.J. C45 (2006) 35-59 |
last update: Aug 12, 2008 by C.Schwanda