Measurement of the relative branching fractions of B{yields}D/D*/D**l{sup -}{nu}{sub l} decays in events with a fully reconstructed B meson

Journal Article · Sat Sep 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.051101· OSTI ID:21027662

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[1]; Tico, J Garra; Grauges, E ^[2]; Lopez, L; Palano, A ^[3]; Eigen, G; Ofte, I; Stugu, B; Sun, L ^[4]; Abrams, G S; Battaglia, M; Brown, D N ^[5]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, 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 determine the relative branching fractions of semileptonic B decays to charmed final states. The measurement is performed on the recoil from a fully reconstructed B meson in a sample of 362x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the BABAR detector. A simultaneous fit to a set of discriminating variables is performed on a sample of B{yields}DXl{sup -}{nu}{sub l} decays to determine the contributions from the different channels. We measure {gamma}(B{sup -}{yields}Dl{sup -}{nu}{sub l})/{gamma}(B{sup -}{yields}DXl{sup -}{nu}{sub l})=0.227{+-}0.014{+-}0.016 = , {gamma}(B{sup -}{yields}D*l{sup -}{nu}{sub l})/{gamma}(B{sup -}{yields}DXl{sup -}{nu}{sub l})=0.582{+-}0.018{+-}0.03 = 0, and {gamma}(B{sup -}{yields}D**l{sup -}{nu}{sub l})/{gamma}(B{sup -}{yields}DXl{sup -}{nu}{sub l})=0.191{+-}0.013{+-}0.0 = 19 for the charged B sample, and {gamma}(B{sup 0}{yields}Dl{sup -}{nu}{sub l})/{gamma}(B{sup 0}{yields}DXl{sup -}{nu}{sub l})=0.215{+-}0.016{+-}0.013 = , {gamma}(B{sup 0}{yields}D*l{sup -}{nu}{sub l})/{gamma}(B{sup 0}{yields}DXl{sup -}{nu}{sub l})=0.537{+-}0.031{+-}0.03 = 6, and {gamma}(B{sup 0}{yields}D**l{sup -}{nu}{sub l})/{gamma}(B{sup 0}{yields}DXl{sup -}{nu}{sub l})=0.248{+-}0.032{+-}0.0 = 30 for the neutral B sample, where uncertainties are statistical and systematic, respectively.

• OSTI ID: 21027662
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
BRANCHING RATIO
D MESONS
D*-2010 MESONS
ELECTRON-POSITRON INTERACTIONS
MULTIPARTICLE SPECTROMETERS
NEUTRINOS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
QUANTUM CHROMODYNAMICS
RECOILS
UPSILON-10580 MESONS
XI BARYONS