Measurement of semileptonic B decays into orbitally excited charmed mesons
(2009) Measurement of semileptonic B decays into orbitally excited charmed mesons. Physical Review Letters, Vol.103 (No.5). article no. 051803 . ISSN 0031-9007 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.103.051803
We present a study of B decays into semileptonic final states containing charged and neutral D-1(2420) and D-2*(2460). The analysis is based on a data sample of 208 fb(-1) collected at the Y(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 Delta m = m(D**) - m(D) distribution. Product branching fractions are determined to be B(B+ -> D(1)(0)l(+)nu(l)) x B(D-1(0) -> D*+pi(-)) = (2.97 +/- 0.17 +/- 0.17) x 10(-3), B(B+ -> D-2*l(+)nu(e)) x B(D-2*(0) -> D(*)+pi(-)) = (2.29 +/- 0.23 +/- 0.21) x 10(-3), B(B-0 -> D(1)(-)l(+)nu(l)) x B(D-1(-) -> D*(0)pi(-)) = (2.78 +/- 0.24 +/- 0.25) x 10(-3) and B(B-0 -> D-2*(-)l(+)nu(l)) x B(D-2(*-) -> D-(*)0 pi(-)) = (1.77 +/- 0.26 +/- 0.11) x 10(-3). In addition we measure the branching ratio Gamma(D2* -> D pi(-))/Gamma(D-2* -> D-(*)pi(-)) = 0.62 +/- 0.03 +/- 0.02.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Science > Physics|
|Journal or Publication Title:||Physical Review Letters|
|Publisher:||American Physical Society|
|Official Date:||31 July 2009|
|Number of Pages:||7|
|Page Range:||article no. 051803|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||DOE, NSF (USA), NSERC (Canada), CEA, CNRS-IN2P3 (France), BMBF, DFG (Germany), INFN ( Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MEC (Spain), STFC (United Kingdom), Marie Curie EIF (European Union), A. P. Sloan Foundation|
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