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.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Determination of from measurements of the electron and neutrino momenta in inclusive semileptonic B decays. PHYSICAL REVIEW LETTERS, 95(11) [10.1103/PhysRevLett.95.111801].

Determination of from measurements of the electron and neutrino momenta in inclusive semileptonic B decays

CARPINELLI, Massimo;
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.
Articolo in rivista - Articolo scientifico
Detectors; Electrons; Matrix algebra; Measurement theory; Quantum theory; Storage rings; Electron energy; Kobayashi-Maskawa matrix element; Neutrino momenta; Semileptonic B decays; High energy physics;
English
2005
95
11
111801
none
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Determination of from measurements of the electron and neutrino momenta in inclusive semileptonic B decays. PHYSICAL REVIEW LETTERS, 95(11) [10.1103/PhysRevLett.95.111801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389893
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