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http://hdl.handle.net/2445/131206
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DC Field | Value | Language |
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dc.contributor.author | Badalov, Alexey | - |
dc.contributor.author | Calvo Gómez, Míriam | - |
dc.contributor.author | Camboni, Alessandro | - |
dc.contributor.author | Garrido Beltrán, Lluís | - |
dc.contributor.author | Graciani Díaz, Ricardo | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | Marin Benito, Carla | - |
dc.contributor.author | Picatoste Olloqui, Eduardo | - |
dc.contributor.author | Rives Molina, Vicente José | - |
dc.contributor.author | Ruiz, Hugo (Ruiz Pérez) | - |
dc.contributor.author | Vilasis-Cardona, Xavier | - |
dc.contributor.author | LHCb Collaboration | - |
dc.date.accessioned | 2019-04-02T11:31:29Z | - |
dc.date.available | 2019-04-02T11:31:29Z | - |
dc.date.issued | 2014-07-09 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.uri | http://hdl.handle.net/2445/131206 | - |
dc.description.abstract | The resonant structure of the reaction ¯ B 0 → J / ψ π + π − is studied using data from 3 fb − 1 of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the π + π − pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering π + π − states, ρ ( 770 ) , f 0 ( 500 ) , f 2 ( 1270 ) , ρ ( 1450 ) , ω ( 782 ) and ρ ( 1700 ) , are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The f 0 ( 980 ) meson is not seen and the upper limit on its presence, compared with the observed f 0 ( 500 ) rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the q ¯ q model, the absolute value of the mixing angle between the f 0 ( 980 ) and the f 0 ( 500 ) scalar mesons is limited to be less than 17° at 90% confidence level. | - |
dc.format.extent | 21 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.90.012003 | - |
dc.relation.ispartof | Physical Review D, 2014, vol. 90, num. 1, p. 012003 | - |
dc.relation.uri | https://doi.org/10.1103/PhysRevD.90.012003 | - |
dc.rights | cc by (c) CERN; LHCb Collaboration, 2014 | - |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Gran Col·lisionador d'Hadrons | - |
dc.subject.classification | Ressonància | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Large Hadron Collider (France and Switzerland) | - |
dc.subject.other | Resonance | - |
dc.subject.other | Experiments | - |
dc.title | Measurement of the resonant and CP components in ¯¯B0 → J/ψπ+π− decays | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 645756 | - |
dc.date.updated | 2019-04-02T11:31:29Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
Files in This Item:
File | Description | Size | Format | |
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645756.pdf | 1.12 MB | Adobe PDF | View/Open |
This item is licensed under a Creative Commons License