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http://hdl.handle.net/2445/133068| Title: | Observation of ¯B0(s)→J/ψ f1(1285) Decays and Measurement of the f1(1285) Mixing Angle |
| Author: | Badalov, Alexey Calvo Gómez, Míriam Camboni, Alessandro Comerma Montells, Albert Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Oyanguren Campos, Arantza de Pérez-Calero Yzquierdo, Antonio Potterat, Cédric Ruiz, Hugo (Ruiz Pérez) Ruiz Valls, Pablo Vilasis-Cardona, Xavier LHCb Collaboration |
| Keywords: | Física de partícules Experiments Particle physics Experiments |
| Issue Date: | 4-Mar-2014 |
| Publisher: | American Physical Society |
| Abstract: | Decays of ¯ B 0 s and ¯ B 0 mesons into J / ψ π + π − π + π − final states, produced in p p collisions at the LHC, are investigated using data corresponding to an integrated luminosity of 3 fb − 1 collected with the LHCb detector. ¯ B 0 ( s ) → J / ψ f 1 ( 1285 ) decays are seen for the first time, and the branching fractions are measured. Using these rates, the f 1 ( 1285 ) mixing angle between strange and nonstrange components of its wave function in the q ¯ q structure model is determined to be ± ( 24 . 0 + 3.1 + 0.6 − 2.6 − 0.8 ) ° . Implications on the possible tetraquark nature of the f 1 ( 1285 ) are discussed. |
| Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.112.091802 |
| It is part of: | Physical Review Letters, 2014, vol. 112, num. 9, p. 091802 |
| URI: | http://hdl.handle.net/2445/133068 |
| Related resource: | https://doi.org/10.1103/PhysRevLett.112.091802 |
| ISSN: | 0031-9007 |
| Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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