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Title: | χc1 and χc2 Resonance Parameters with the Decays χc1,c2→J/ψμ+μ− |
Author: | Alfonso Albero, Alejandro Badalov, Alexey Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Fernandez, G. Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José Vilasis-Cardona, Xavier LHCb Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 28-Nov-2017 |
Publisher: | American Physical Society |
Abstract: | The decays χc 1→J /ψ μ+μ- and χc 2→J /ψ μ+μ- are observed and used to study the resonance parameters of the χc 1 and χc 2 mesons. The masses of these states are measured to be m (χc 1)=3510.71 ±0.04 (stat ) ±0.09 (syst ) MeV and m (χc 2)=3556.10 ±0.06 (stat ) ±0.11 (syst ) MeV , where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m (χc 2)-m (χc 1)=45.39 ±0.07 (stat ) ±0.03 (syst ) MeV . The natural width of the χc 2 meson is measured to be Γ (χc 2)=2.10 ±0.20 (stat ) ±0.02 (syst ) MeV . These results are in good agreement with and have comparable precision to the current world averages. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.119.221801 |
It is part of: | Physical Review Letters, 2017, vol. 119, num. 22, p. 221801 |
URI: | http://hdl.handle.net/2445/132657 |
Related resource: | https://doi.org/10.1103/PhysRevLett.119.221801 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) |
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