Determination of vertical bar V{sub ub} vertical bar from Measurements of the Electron and Neutrino Momenta in Inclusive Semileptonic B Decays

Journal Article · Fri Sep 09 04:00:00 EDT 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.111801· OSTI ID:20699416

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A; Pappagallo, M; Pompili, A ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I ^[5]

---

1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
2. IFAE, Universitat Autonoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway); and others

We present a determination of the Cabibbo-Kobayashi-Maskawa matrix element |V{sub ub}| based on the analysis of semileptonic B decays from a sample of 88x10{sup 6} {upsilon}(4S) decays collected with the BABAR detector at the SLAC PEP-II e{sup +}e{sup -} 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 vertical bar V{sub ub} vertical bar =(3.95{+-}0.26{sub -0.42}{sup +0.58}{+-}0.25)x10{sup -3}, where the errors represent experimental uncertainties, heavy quark parameter uncertainties, and theoretical uncertainties, respectively.

• OSTI ID: 20699416
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 11 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
B QUARKS
C QUARKS
CP INVARIANCE
ELECTRONS
ERRORS
KOBAYASHI-MASKAWA MATRIX
MASS
NEUTRINOS
SEMILEPTONIC DECAY
STANDARD MODEL
STANFORD LINEAR ACCELERATOR CENTER
STORAGE RINGS
T QUARKS