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AbstractAbstract
[en] The study of the semileptonic B-meson decays is the most accessible and cleanest way to determine the CKM matrix elements |Vcb| and Vub. These decays also provide experimental access to study the QCD form-factors, heavy quark masses, and HQE parameters. The theoretical description of semileptonic B-meson decays at the parton level is very simple because there is no interaction between leptonic and hadronic currents. At the hadron level one needs to introduce corrections due to the strong interaction between quarks. Especially in the description of the inclusive B-meson decays the motion of the b-quark inside the B-meson plays a crucial role. All these effects are described in the frameworks of Heavy Quark Effective Theory (HQET) and Lattice QCD (LQCD). We give an overview about results of studies of semileptonic B-meson decays collected with the BABAR and Belle detectors at the PEP-II and the KEKB e+e--storage rings. We present recent results on hadronic moments measured in inclusive B → Xclv and B → Xulv decays and extracted heavy quark masses mb and mc and dominant non-perturbative Heavy Quark Expansion (HQE) parameters. We also report the measurements of the CKM matrix elements |Vcb| and |Vub| in inclusive and in exclusive semileptonic B-meson decays. We describe the studies of the form-factor parameters for the decay B0 → D*-l+v and present the measurement of the B0 → π-l+v form-factor shape.
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26 Aug 2010; 6 p; HSQCD 2008: Workshop on Hadron Structure and QCD: from Low to High Energies; Gatchina (Russian Federation); 30 Jun - 4 Jul 2008; AC02-76SF00515; Available from http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-13485.pdf and http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-13485.html; PURL: https://www.osti.gov/servlets/purl/992465-YIiWob/
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