Determinations of |Vub| with inclusive techniques at LEP

Details Determinations of |Vub| with inclusive techniques at LEP Determinations of |Vub| with inclusive techniques at LEP

2000-08-27

arxiv.org/abs/hep-ex/0008066v1

Nucl.Phys.Proc.Suppl.93:291-295,2001

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 4 figures, to appear in the Proceedings of the IV Int. Conf. on Hyperons, Charm and Beauty Hadrons, Valencia (Spain),

Scientific paper

10.1016/S0920-5632(00)01121-X

The charmless semileptonic decay branching fraction has been measured, using inclusive techniques, by the Aleph, Delphi and L3 experiments at LEP. The average of their results is 1.74 +/- 0.37 +/- 0.38 +/- 0.21 10-3. From this result the value of the |Vub| element in the CKM mixing matrix has been derived, using OPE predictions, obtaining: |Vub| = (4.13 +0.42/-0.47 (stat.+det.) +0.43/-0.48 (b->c syst.) +0.24/-0.25 (b->u syst.) +/- 0.02 (taub) +/- 0.20 (HQE)) 10-3.

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