Measurement of Semileptonic B Decays into Orbitally Excited Charmed Mesons

Journal Article · Fri Jul 31 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.051803· OSTI ID:21370604

Aubert, B; Bona, M; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Lopez, L; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Abrams, G S; Battaglia, M; Brown, D N; Cahn, R 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. INFN Sezione di Bari, Dipartmento 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 study of B decays into semileptonic final states containing charged and neutral D{sub 1}(2420) and D{sub 2}*(2460). The analysis is based on a data sample of 208 fb{sup -1} collected at the UPSILON(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. With a simultaneous fit to four different decay chains, the semileptonic branching fractions are extracted from measurements of the mass difference DELTAm=m(D**)-m(D) distributions. Product branching fractions are determined to be B(B{sup +}->D{sub 1}{sup 0}l{sup +}nu{sub l})xB(D{sub 1}{sup 0}->D*{sup +}pi{sup -})=(2.97+-0.17+-0.17)x10{sup -3}, B(B{sup +}->D{sub 2}*{sup 0}l{sup +}nu{sub l})xB(D{sub 2}*{sup 0}->D{sup (*)+}pi{sup -})=(2.29+-0.23+-0.21)x10{sup -3}, B(B{sup 0}->D{sub 1}{sup -}l{sup +}nu{sub l})xB(D{sub 1}{sup -}->D*{sup 0}pi{sup -})=(2.78+-0.24+-0.25)x10{sup -3} and B(B{sup 0}->D{sub 2}*{sup -}l{sup +}nu{sub l})xB(D{sub 2}*{sup -}->D{sup (*)0}pi{sup -})=(1.77+-0.26+-0.11)x10{sup -3}. In addition we measure the branching ratio GAMMA(D{sub 2}*->Dpi{sup -})/GAMMA(D{sub 2}*->D{sup (*)}pi{sup -})=0.62+-0.03+-0.02.

• OSTI ID: 21370604
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 5 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ASYMMETRY
AXIAL VECTOR MESONS
B MESONS
B NEUTRAL MESONS
B PLUS MESONS
BEAUTY MESONS
BEAUTY PARTICLES
BOSONS
BRANCHING RATIO
CHARM PARTICLES
CHARMED MESONS
D*2-2460 MESONS
D1-2420 MESONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
HADRONS
MASS DIFFERENCE
MESON FACTORIES
MESONS
NATIONAL ORGANIZATIONS
PARTICLE DECAY
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PIONS
PIONS MINUS
PSEUDOSCALAR MESONS
SEMILEPTONIC DECAY
STANFORD LINEAR ACCELERATOR CENTER
TENSOR MESONS
US DOE
US ERDA
US ORGANIZATIONS
WEAK PARTICLE DECAY