Measurement of |V{sub cb}| and the Form-Factor Slope in B->Dl{sup -}nu{sub l} Decays in Events Tagged by a Fully Reconstructed B Meson

Journal Article · Fri Jan 08 04:00:00 EST 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.011802· OSTI ID:21386882

Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Tico, J Garra; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Bari, Dipartimento di Fisica, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |V{sub cb}| and the form-factor slope rho{sup 2} in B->Dl{sup -}nu{sub l} decays based on 460x10{sup 6} BB events recorded at the {Upsilon}(4S) resonance with the BABAR detector. B->Dl{sup -}nu{sub l} decays are selected in events in which a hadronic decay of the second B meson is fully reconstructed. We measure B(B{sup -}->D{sup 0}l{sup -}nu{sub l})/B(B{sup -}->Xl{sup -}nu{sub l})=(0.255+-0.009+-0.009) and B(B{sup 0}->D{sup +}l{sup -}nu{sub l})/B(B{sup 0}->Xl{sup -}nu{sub l})=(0.230+-0.011+-0.011), along with the differential decay distribution in B->Dl{sup -}nu{sub l} decays. We then determine G(1)|V{sub cb}|=(42.3+-1.9+-1.4)x10{sup -3} and rho{sup 2}=1.20+-0.09+-0.04, where G(1) is the hadronic form factor at the point of zero recoil.

• OSTI ID: 21386882
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
DECAY
DIMENSIONLESS NUMBERS
DISTRIBUTION
ELEMENTARY PARTICLES
FORM FACTORS
HADRONIC PARTICLE DECAY
HADRONS
KOBAYASHI-MASKAWA MATRIX
MATRICES
MESONS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PARTICLE PROPERTIES
PEP STORAGE RINGS
PSEUDOSCALAR MESONS
RECOILS
RESONANCE
STORAGE RINGS