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Observation of X(3872) production in pp collisions at s√=7 TeV
LHCb Collaboration; Abellan Beteta, Carlos; Calvo Gómez, M.; Camboni, Alessandro; Comerma Montells, Albert; Domingo Bonal, F.; Garrido Beltrán, Lluís; Gascón Fora, David; Grabalosa Gándara, Marc; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; Lopez Asamar, E.; Musy, Marco; Pérez-Calero Yzquierdo, Antonio; Picatoste Olloqui, Eduardo; Pie Valls, B. (Blai); Potterat, Cédric; Puig Navarro, Albert; Roselló, M.; Ruiz, Hugo (Ruiz Pérez); Vázquez Gómez, R.; Vilasis-Cardona, X.
Universitat de Barcelona
Using 34.7 pb−1 of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at s√=7~TeV is observed for the first time. Candidates are selected in the X(3872)→J/ψπ + π − decay mode, and used to measure where σ(pp→X(3872)+anything) is the inclusive production cross section of X(3872) mesons with rapidity in the range 2.5
4.5 and transverse momentum in the range 5
20 GeV/c. In addition the masses of both the X(3872) and ψ(2S) mesons, reconstructed in the J/ψπ + π − final state, are measured to be mX(3872)=3871.95±0.48 (stat)±0.12 (syst) MeV/c2 and mψ(2S)=3686.12±0.06 (stat)±0.10 (syst) MeV/c2.
Física nuclear
Hadrons
Teoria quàntica de camps
Astrofísica
Energia nuclear
Nuclear physics
Hadrons
Quantum field theory
Astrophysics
Nuclear energy
cc by, (c) LHCb Collaboration, 2012
Article
info:eu-repo/semantics/publishedVersion
EDP Sciences
         

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