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http://hdl.handle.net/2445/139435
Title: | Measurement of the Branching Fractions of ¯¯¯B→D**ℓ−¯νℓ Decays in Events Tagged by a Fully Reconstructed B Meson |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 23-Dec-2008 |
Publisher: | American Physical Society |
Abstract: | We report a measurement of the branching fractions of ¯¯¯ B → D ** ℓ − ¯ ν ℓ decays based on 417 fb − 1 of data collected at the Υ ( 4 S ) resonance with the BABAR detector at the PEP-II e + e − storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m ( D ( * ) π ) − m ( D ( * ) ) is performed to extract the signal yields of the different D ** states. We observe the ¯¯¯ B → D ** ℓ − ¯ ν ℓ decay modes corresponding to the four D ** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.101.261802 |
It is part of: | Physical Review Letters, 2008, vol. 101, num. 26, p. 261802 |
URI: | http://hdl.handle.net/2445/139435 |
Related resource: | https://doi.org/10.1103/PhysRevLett.101.261802 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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