We present a determination of the Cabibbo-Kobayashi-Maskawa matrix element parallel to V(ub)parallel to based on the analysis of semileptonic B decays from a sample of 88x10(6) Upsilon(4S) decays collected with the BABAR detector at the SLAC PEP-II e(+)e(-) storage ring. Charmless semileptonic B decays are selected using measurements of the electron energy and the invariant mass squared of the electron-neutrino pair. We obtain parallel to V(ub)parallel to=(3.95 +/- 0.26(-0.42)(+0.58)+/- 0.25)x10(-3), where the errors represent experimental uncertainties, heavy quark parameter uncertainties, and theoretical uncertainties, respectively.
Titolo: | Determination of |Vub| from Measurements of the Electron and Neutrino Momenta in Inclusive Semileptonic B Decays | |
Autori: | ||
Data di pubblicazione: | 2005 | |
Rivista: | ||
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.95.111801 | |
Settore Scientifico Disciplinare: | Settore FIS/01 - Fisica Sperimentale | |
Handle: | http://hdl.handle.net/11384/4392 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |