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 — preprints:2002:ttp02-28 [2016/03/15 20:39] (current) Line 1: Line 1: + ====== TTP02-28 Subleading Shape Functions and the Determination of $V_{ub}$ ====== + + + The endpoint region of the inclusive lepton energy spectrum + in $B \to X_u \ell \bar\nu$ can be used for a determination of + $V_{ub}$ by comparing it to the endpoint region of the + inclusive photon spectrum of $B \to X_s \gamma$. We consider + the subleading twist contributions to this $V_{ub}$ determination. + + |**Thomas Mannel**  | + |**  Proceedings of ICHEP 2002, Elsevier Science B.V., Bentvelsen et al.  Eds.    472-474 2002  **  | + | {{preprints:2002:ttp02-28.pdf|PDF}} {{preprints:2002:ttp02-28.ps|PostScript}}   | + | |