Determination of V_ub at the Z-boson resonance
arXiv:hep-ph/9409317 · doi:10.1016/0370-2693(94)01594-3
Abstract
We show that the observation of energetic charged leptons from semileptonic $b$ becays at the LEP and SLC $Z$--boson factories offers a unique opportunity to measure the quark mixing matrix element $V_{ub}$. We present various distributions of the $b$ decay products to show that the $b \to u$ decays can be cleanly separated from the $b \to c$ decays, with a signal of $O(100)$ events per million $Z$ bosons produced.
11 pages including 3 figures (standard tex file)