par Abreu, Paulo;Bertrand, Daniel ;Bricman, Claude ; [et al.]
Référence Physics letters. Section B, 301, 1, page (145-154)
Publication Publié, 1993
Article révisé par les pairs
Résumé : The B0-B̄0 mixing was studied by using about 250000 hadronic decays of the Z0,_collected with the DELPHI detector at LEP. With 1665 dilepton events, the probability for a b quark to become a b̄ before decaying was found to be χ = 0.121-0.040 0.044 ± 0.017. The semileptonic branching ratio of the b was measured from the dilepton and single lepton events and found to be Br(b → l) = (10.0 ± 0.7 ± 0.7)%.