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http://hdl.handle.net/2445/131671
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DC Field | Value | Language |
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dc.contributor.author | Garra Ticó, Jordi | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | BABAR Collaboration | - |
dc.date.accessioned | 2019-04-05T11:42:46Z | - |
dc.date.available | 2019-04-05T11:42:46Z | - |
dc.date.issued | 2009-01-15 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131671 | - |
dc.description.abstract | Semileptonic ¯¯¯ B decays to D X ℓ ¯ ν ( ℓ = e or μ ) are selected by reconstructing D 0 ℓ and D + ℓ combinations from a sample of 230 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays recorded with the BABAR detector at the PEP-II e + e − collider at SLAC. A global fit to these samples in a three-dimensional space of kinematic variables is used to determine the branching fractions B ( B − → D 0 ℓ ¯ ν ) = ( 2.34 ± 0.03 ± 0.13 ) % and B ( B − → D * 0 ℓ ¯ ν ) = ( 5.40 ± 0.02 ± 0.21 ) % where the errors are statistical and systematic, respectively. The fit also determines form-factor parameters in a parametrization based on heavy quark effective theory, resulting in ρ 2 D = 1.20 ± 0.04 ± 0.07 for ¯¯¯ B → D ℓ ¯ ν and ρ 2 D ∗ = 1.22 ± 0.02 ± 0.07 for ¯¯¯ B → D ∗ ℓ ¯ ν . These values are used to obtain the product of the Cabibbo-Kobayashi-Maskawa matrix element | V c b | times the form factor at the zero recoil point for both ¯¯¯ B → D ℓ ¯ ν decays, G ( 1 ) | V c b | = ( 43.1 ± 0.8 ± 2.3 ) × 10 − 3 , and for ¯¯¯ B → D ∗ ℓ ¯ ν decays, F ( 1 ) | V c b | = ( 35.9 ± 0.2 ± 1.2 ) × 10 − 3 . | - |
dc.format.extent | 20 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | American Physical Society | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.79.012002 | - |
dc.relation.ispartof | Physical Review D, 2009, vol. 79, num. 1, p. 012002 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.79.012002 | - |
dc.rights | (c) American Physical Society, 2009 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Measurements of the semileptonic decays ¯¯¯B→Dℓ¯ν and¯¯¯B→D∗ℓ¯ν using a global fit to DXℓ¯ν final states | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 577770 | - |
dc.date.updated | 2019-04-05T11:42:46Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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577770.pdf | 558.74 kB | Adobe PDF | View/Open |
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