We present a determination of the Cabibbo-Kobayashi-Maskawa matrix element based on the analysis of semileptonic B decays from a sample of 88×106 Υ(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 =(3.95±0.26-0.42+0.58±0.25)×10-3, where the errors represent experimental uncertainties, heavy quark parameter uncertainties, and theoretical uncertainties, respectively. © 2005 The American Physical Society.

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.

Determination of |Vub| from Measurements of the Electron and Neutrino Momenta in Inclusive Semileptonic B Decays

LUSIANI, Alberto;
2005

Abstract

We present a determination of the Cabibbo-Kobayashi-Maskawa matrix element based on the analysis of semileptonic B decays from a sample of 88×106 Υ(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 =(3.95±0.26-0.42+0.58±0.25)×10-3, where the errors represent experimental uncertainties, heavy quark parameter uncertainties, and theoretical uncertainties, respectively. © 2005 The American Physical Society.
2005
Settore FIS/01 - Fisica Sperimentale
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.95.111801.pdf

Accesso chiuso

Descrizione: articolo principale
Tipologia: Published version
Licenza: Non pubblico
Dimensione 187.51 kB
Formato Adobe PDF
187.51 kB Adobe PDF   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/4392
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 53
  • ???jsp.display-item.citation.isi??? 67
social impact