QCD-Factorization of inclusive B decays and |Vub|

Details QCD-Factorization of inclusive B decays and |Vub| QCD-Factorization of inclusive B decays and |Vub|

2004-08-30

arxiv.org/abs/hep-ph/0408339v1

Nucl.Phys.Proc.Suppl.142:310-317,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 7 figures, uses espcrc2.sty (included). Talk presented at the Sixth International Conference on Hyperons, Charm and B

Scientific paper

10.1016/j.nuclphysbps.2005.01.05

Recent progress in the theoretical description of inclusive B to X_u l nu decays in the shape-function region is reported. Finite moments of the shape function are related to HQET parameters. Event fractions for several experimental cuts are presented, with a particular emphasis on the hadronic variable P+. The aim of this talk is to introduce the P+ spectrum, to compare it to the hadronic invariant mass spectrum and the charged-lepton energy spectrum, and to study the prospect of evaluating |Vub| in the presence of a large background from B to X_c decays.

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