Determinations of |Vub| from Inclusive Semileptonic B Decays with Reduced Model Dependence

B Aubert, Matthew Barrett, Kelly Ford, Theresa Harrison, Alistair Hart, Christopher Hawkes, Alan Watson, Sian Morgan

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17 Citations (Scopus)


We report two novel determinations of /|Vub/ with reduced model dependence, based on measurements of the mass distribution of the hadronic system in semileptonic B decays. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson from Upsilon(4S)-->BB events. In one approach, we combine the inclusive B-->Xulambdav rate, integrated up to a maximum hadronic mass mXXsgamma photon energy spectrum. We obtain /Vub/=(4.43+/-0.38stat+/-0.25syst+/-0.29theo) x 10-3. In another approach we measure the total B-->Xulambdav rate over the full phase space and find /Vub/=(3.84+/-0.70stat+/-0.30syst+/-0.10theo) x 10-3.
Original languageEnglish
Pages (from-to)221801
Number of pages1
JournalPhysical Review Letters
Publication statusPublished - 1 Jun 2006


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