Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/131833
Title: | Amplitude analysis and branching fraction measurement of B¯s0→J/ψK+K- |
Author: | Camboni, Alessandro Comerma Montells, Albert Garrido Beltrán, Lluís Graciani Díaz, Ricardo Graugés Pous, Eugeni López Asamar, Elias Pérez-Calero Yzquierdo, Antonio Picatoste Olloqui, Eduardo Potterat, Cédric Rives Molina, Vicente José Ruiz, Hugo (Ruiz Pérez) Vázquez Gómez, Ricard Abellan Beteta, Carlos Calvo Gómez, Míriam Vilasis-Cardona, Xavier Domingo Bonal, Francesc LHCb Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 1-Apr-2013 |
Publisher: | American Physical Society |
Abstract: | An amplitude analysis of the final state structure in the ¯¯¯ B 0 s → J / ψ K + K − decay mode is performed using 1.0 fb − 1 of data collected by the LHCb experiment in 7 TeV center-of-mass energy p p collisions produced by the LHC. A modified Dalitz plot analysis of the final state is performed using both the invariant mass spectra and the decay angular distributions. Resonant structures are observed in the K + K − mass spectrum as well as a significant nonresonant S -wave contribution over the entire K + K − mass range. The largest resonant component is the ϕ ( 1020 ) , accompanied by f 0 ( 980 ) , f ′ 2 ( 1525 ) , and four additional resonances. The overall branching fraction is measured to be B ( ¯¯¯ B 0 s → J / ψ K + K − ) = ( 7.70 ± 0.08 ± 0.39 ± 0.60 ) × 10 − 4 , where the first uncertainty is statistical, the second systematic, and the third due to the ratio of the number of ¯¯¯ B 0 s to B − mesons produced. The mass and width of the f ′ 2 ( 1525 ) are measured to be 1522.2 ± 2.8 + 5.3 − 2.0 MeV and 84 ± 6 + 10 − 5 MeV , respectively. The final state fractions of the other resonant states are also reported. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.87.072004 |
It is part of: | Physical Review D, 2013, vol. 87, num. 7, p. 072004 |
URI: | http://hdl.handle.net/2445/131833 |
Related resource: | https://doi.org/10.1103/PhysRevD.87.072004 |
ISSN: | 1550-7998 |
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 | |
---|---|---|---|---|
628975.pdf | 2.37 MB | Adobe PDF | View/Open |
This item is licensed under a
Creative Commons License