Determinations of |Vub| with inclusive techniques at LEP
arXiv:hep-ex/0008066 · doi:10.1016/S0920-5632(00)01121-X
Abstract
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.
5 pages, 4 figures, to appear in the Proceedings of the IV Int. Conf. on Hyperons, Charm and Beauty Hadrons, Valencia (Spain), July 2000