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http://hdl.handle.net/2445/131748
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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 | 2019-04-08T10:35:20Z | - |
dc.date.available | 2019-04-08T10:35:20Z | - |
dc.date.issued | 2011-04-01 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131748 | - |
dc.description.abstract | Using 347.5 fb − 1 of data recorded by the BABAR detector at the PEP-II electron-positron collider, 244 × 10 3 signal events for the D + → K − π + e + ν e decay channel are analyzed. This decay mode is dominated by the ¯¯¯¯ K ∗ ( 892 ) 0 contribution. We determine the ¯¯¯¯ K ∗ ( 892 ) 0 parameters: m K ∗ ( 892 ) 0 = ( 895.4 ± 0.2 ± 0.2 ) MeV / c 2 , Γ 0 K ∗ ( 892 ) 0 = ( 46.5 ± 0.3 ± 0.2 ) MeV / c 2 , and the Blatt-Weisskopf parameter r BW = 2.1 ± 0.5 ± 0.5 ( GeV / c ) − 1 , where the first uncertainty comes from statistics and the second from systematic uncertainties. We also measure the parameters defining the corresponding hadronic form factors at q 2 = 0 ( r V = V ( 0 ) A 1 ( 0 ) = 1.463 ± 0.017 ± 0.031 , r 2 = A 2 ( 0 ) A 1 ( 0 ) = 0.801 ± 0.020 ± 0.020 ) and the value of the axial-vector pole mass parametrizing the q 2 variation of A 1 and A 2 : m A = ( 2.63 ± 0.10 ± 0.13 ) GeV / c 2 . The S -wave fraction is equal to ( 5.79 ± 0.16 ± 0.15 ) % . Other signal components correspond to fractions below 1%. Using the D + → K − π + π + channel as a normalization, we measure the D + semileptonic branching fraction: B ( D + → K − π + e + ν e ) = ( 4.00 ± 0.03 ± 0.04 ± 0.09 ) × 10 − 2 , where the third uncertainty comes from external inputs. We then obtain the value of the hadronic form factor A 1 at q 2 = 0 : A 1 ( 0 ) = 0.6200 ± 0.0056 ± 0.0065 ± 0.0071 . Fixing the P -wave parameters, we measure the phase of the S wave for several values of the K π mass. These results confirm those obtained with K π production at small momentum transfer in fixed target experiments. | - |
dc.format.extent | 35 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.83.072001 | - |
dc.relation.ispartof | Physical Review D, 2011, vol. 83, num. 7, p. 072001 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.83.072001 | - |
dc.rights | (c) American Physical Society, 2011 | - |
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 | Analysis of the D+→K−π+e+νe decay channel | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 602001 | - |
dc.date.updated | 2019-04-08T10:35:21Z | - |
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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602001.pdf | 1.42 MB | Adobe PDF | View/Open |
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