Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/132657
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 (Electrònica)

Files in This Item:
File Description SizeFormat 
678033.pdf309.7 kBAdobe PDFView/Open


This item is licensed under a Creative Commons License Creative Commons