Semileptonic inclusive B decays and the determination of |Vub| from QCD sum rules

URN to cite this document:: urn:nbn:de:bvb:355-epub-139963
DOI to cite this document:: 10.5283/epub.13996

Ball, Patricia ; Braun, Vladimir M. ; Dosch, H. G.

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Date of publication of this fulltext: 12 Apr 2010 12:18

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Abstract

We calculate the electron spectrum of semileptonic decays of B mesons into noncharmed hadrons. The shape of the spectrum obtained from QCD sum rules is in general agreement with quark model calculations. At high electron energies the decrease of the spectrum is less steep than predicted by Altarelli et al. Our analysis yields a total decay rate Γ(B→Xueν̅ )=(6.8±2.0)×1013|Vub|2 s-1. For the ...