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http://hdl.handle.net/2445/131496
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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 | 2019-04-05T10:19:42Z | - |
dc.date.available | 2019-04-05T10:19:42Z | - |
dc.date.issued | 2008-09-09 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131496 | - |
dc.description.abstract | Using 214 fb − 1 of data recorded by the BABAR detector at the PEPII electron-positron collider, we study the decay D + s → K + K − e + ν e . Except for a small S-wave contribution, the events with K + K − masses in the range 1.01 - 1.03 GeV / c 2 correspond to ϕ mesons. For D + s → ϕ e + ν e decays, we measure the relative normalization of the Lorentz invariant form factors at q 2 = 0 , r V = V ( 0 ) / A 1 ( 0 ) = 1.849 ± 0.060 ± 0.095 , r 2 = A 2 ( 0 ) / A 1 ( 0 ) = 0.763 ± 0.071 ± 0.065 and the pole mass of the axial-vector form factors m A = ( 2.28 + 0.23 − 0.18 ± 0.18 ) GeV / c 2 . Within the same K + K − mass range, we also measure the relative branching fraction B ( D + s → K + K − e + ν e ) / B ( D + s → K + K − π + ) = 0.558 ± 0.007 ± 0.016 , from which we obtain the total branching fraction B ( D + s → ϕ e + ν e ) = ( 2.61 ± 0.03 ± 0.08 ± 0.15 ) × 10 − 2 . By comparing this value with the predicted decay rate, we extract A 1 ( 0 ) = 0.607 ± 0.011 ± 0.019 ± 0.018 . The stated uncertainties are statistical, systematic, and from external inputs. | - |
dc.format.extent | 8 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.78.051101 | - |
dc.relation.ispartof | Physical Review D, 2008, vol. 78, num. 5, p. 051101 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.78.051101 | - |
dc.rights | (c) American Physical Society, 2008 | - |
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 | Study of the decay D+s→K+K−e+νe | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 577673 | - |
dc.date.updated | 2019-04-05T10:19:42Z | - |
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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577673.pdf | 298.11 kB | Adobe PDF | View/Open |
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