Using 34.7 pb(-1) of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at root s = 7 TeV is observed for the first time. Candidates are selected in the X(3872) -> J/psi pi(+)pi(-) decay mode, and used to measure sigma(pp -> X(3872) + anything)beta(X(3872) -> J/psi pi(+)pi(-)) = 5.4 +/- 1.3 (stat)+/- 0.8 (syst) nb, where sigma (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 psi(2S) mesons, reconstructed in the J/psi pi(+)pi(-) final state, are measured to be m(X(3872)) = 3871.95 +/- 0.48 (stat)+/- 0.12 (syst) MeV/c(2) and m(psi(2S)) = 3686.12 +/- 0.06 (stat)+/- 0.10 (syst) MeV/c(2).

Archilli, F., Carboni, G., Messi, R., Santovetti, E., The LHCb, C. (2012). Observation of X(3872) production in pp collisions at root s=7 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 72(5) [10.1140/epjc/s10052-012-1972-7].

Observation of X(3872) production in pp collisions at root s=7 TeV

Archilli, F
Membro del Collaboration Group
;
Carboni, G
Membro del Collaboration Group
;
Messi, R
Membro del Collaboration Group
;
Santovetti, E
Membro del Collaboration Group
;
2012-01-01

Abstract

Using 34.7 pb(-1) of data collected with the LHCb detector, the inclusive production of the X(3872) meson in pp collisions at root s = 7 TeV is observed for the first time. Candidates are selected in the X(3872) -> J/psi pi(+)pi(-) decay mode, and used to measure sigma(pp -> X(3872) + anything)beta(X(3872) -> J/psi pi(+)pi(-)) = 5.4 +/- 1.3 (stat)+/- 0.8 (syst) nb, where sigma (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 psi(2S) mesons, reconstructed in the J/psi pi(+)pi(-) final state, are measured to be m(X(3872)) = 3871.95 +/- 0.48 (stat)+/- 0.12 (syst) MeV/c(2) and m(psi(2S)) = 3686.12 +/- 0.06 (stat)+/- 0.10 (syst) MeV/c(2).
2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Archilli, F., Carboni, G., Messi, R., Santovetti, E., The LHCb, C. (2012). Observation of X(3872) production in pp collisions at root s=7 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 72(5) [10.1140/epjc/s10052-012-1972-7].
Archilli, F; Carboni, G; Messi, R; Santovetti, E; The LHCb, C
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/135403
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