Measurements of the B{yields}D* form factors using the decay B{sup 0}{yields}D*{sup +}e{sup -}{nu}{sub e}

Journal Article · Wed Nov 01 04:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.092004· OSTI ID:20873111

Aubert, B; Barate, R; Boutigny, D ^[1]

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1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)

We measure the dependence of B{sup 0}{yields}D*{sup +}e{sup -}{nu}{sub e} on the decay angles and momentum transfer. The data sample consists of {approx}86x10{sup 6} BB-pairs accumulated on the {upsilon}(4S) resonance by the BABAR detector at the asymmetric e{sup +}e{sup -} collider PEP-II. We specify the three form factors by two ratios R{sub 1} and R{sub 2}, and by a single parameter {rho}{sup 2} characterizing the polynomial representing h{sub A{sub 1}}, the function which describes the momentum-transfer dependence of the form factor A{sub 1}. We determine R{sub 1}, R{sub 2}, and {rho}{sup 2} using an unbinned maximum likelihood fit to the full decay distribution. The results are R{sub 1}=1.396{+-}0.060{+-}0.035{+-}0.027, R{sub 2}=0.885{+-}0.040{+-}0.022{+-}0.013, and {rho}{sup 2}=1.145{+-}0.059{+-}0.030{+-}0.035. The stated uncertainties are the statistical from the data, statistical from the size of the Monte Carlo sample and the systematic uncertainty, respectively. In addition, based on this measurement, we give an updated value for the CKM matrix element |V{sub cb}|.

• OSTI ID: 20873111
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
B NEUTRAL MESONS
D*-2010 MESONS
DISTRIBUTION
ELECTRON NEUTRINOS
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
FORM FACTORS
KOBAYASHI-MASKAWA MATRIX
MAXIMUM-LIKELIHOOD FIT
MOMENTUM TRANSFER
MONTE CARLO METHOD
MULTIPARTICLE SPECTROMETERS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
POLYNOMIALS
UPSILON-10580 MESONS