Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb|

Details Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb| Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb|

2004-08-10

arxiv.org/abs/hep-ex/0408027v1

Phys.Rev.D71:051502,2005

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 4 postscript figures, contributed to ICHEP'04, 32nd International Conference on High Energy Physics, 8/16 - 8/22/2004

Scientific paper

10.1103/PhysRevD.71.051502

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| based on a sample of about 53,700 B0bar --> D*+ l- nubar_l decays observed by the BaBar detector. We obtain the branching fraction averaged over l = e, mu, BR(B0bar --> D*+ l- nubar_l) = (4.90 +- 0.07(stat.) +0.36-0.35(syst.))%. We measure the differential decay rate as a function of w, the relativistic boost gamma of the D*+ in the B0bar rest frame. By extrapolating dGamma/dw to the kinematic limit w --> 1, we extract the product of |Vcb| and the axial form factor A_1(w=1). We combine this measurement with a lattice QCD calculation of A_1(w=1) to determine |Vcb| = (38.7 +- 0.3(stat.) +- 1.7(syst.) +1.5-1.3(theory)) * 10^-3.

Affiliated with

Also associated with

No associations

Rating

Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb| does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb|, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb| will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-689431