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Measurements of B ->{pi,eta,eta '}l nu(l) branching fractions and determination of vertical bar V-ub vertical bar with semileptonically tagged B mesons
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BaBar Collaboration (Including:
). (2008) Measurements of B ->{pi,eta,eta '}l nu(l) branching fractions and determination of vertical bar V-ub vertical bar with semileptonically tagged B mesons. Physical Review Letters, Vol.101 (No.8). article no. 081801. doi:10.1103/PhysRevLett.101.081801 Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.101.081801
Abstract
We report measurements of branching fractions for the decays B -> Pl nu(l), where P are the pseudoscalar charmless mesons pi(-), pi(0), eta and eta('), based on 348 fb(-1) of data collected with the BABAR detector, using B-0 and B+ mesons found in the recoil of a second B meson decaying as B -> D-(*())l nu(l). Assuming isospin symmetry, we combine pionic branching fractions to obtain B(B-0 -> pi(-)l(+)nu(l)) = (1.54 +/- 0.17((stat)) +/- 0.09((syst))) x 10(-4); we find 3.2 sigma evidence of the decay B+ -> eta l(+)nu(l) and measure its branching fraction to be (0.64 +/- 0.20((stat))+/- 0.03((syst)))x10(-4), and determine B(B+ -> eta'l(+)nu(l)) < 0.47 x 10(-4) to 90% confidence level. Using partial branching fractions for the pionic decays in ranges of the momentum transfer and a variety of form factor calculation, we obtain values of the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar in ranging from 3.6 x 10(-3) to 4.1 x 10(-3).
| 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 | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 22 August 2008 | ||||
| Dates: |
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| Volume: | Vol.101 | ||||
| Number: | No.8 | ||||
| Number of Pages: | 7 | ||||
| Page Range: | article no. 081801 | ||||
| DOI: | 10.1103/PhysRevLett.101.081801 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Funder: | SLAC, 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 |
Data sourced from Thomson Reuters' Web of Knowledge
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