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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/ψ π+ π− decay mode, and used to measure σ(pp → X(3872) + anything) B(X(3872) → J/ψ π+ π−) = 5.4 ± 1.3(stat) ± 0.8(syst) nb, 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/ψ π+ 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.

R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2012). Observation of X(3872) Production in pp Collisions at √s = 7 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 72(5), 1-9 [10.1140/epjc/s10052-012-1972-7].

Observation of X(3872) Production in pp Collisions at √s = 7 TeV

CARBONE, ANGELO;GALLI, DOMENICO;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;
2012

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 √s = 7 TeV is observed for the first time. Candidates are selected in the X(3872) → J/ψ π+ π− decay mode, and used to measure σ(pp → X(3872) + anything) B(X(3872) → J/ψ π+ π−) = 5.4 ± 1.3(stat) ± 0.8(syst) nb, 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/ψ π+ 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.
2012
R. Aaij, C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, et al. (2012). Observation of X(3872) Production in pp Collisions at √s = 7 TeV. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 72(5), 1-9 [10.1140/epjc/s10052-012-1972-7].
R. Aaij; C. Abellan Beteta; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; G. Alkhazov; P. Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/116083
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