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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/221838
Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at √s = 13 TeV
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The cross-section of associated J/ψ-ψ(2S) production in proton-proton collisions at a centre-of-mass energy of √ s = 13 TeV is measured using a data sample corresponding to an integrated luminosity of 4.2 fb−1 , collected by the LHCb experiment. The measurement is performed for both J/ψ and ψ(2S) mesons having transverse momentum pT < 14 GeV/c and rapidity 2.0 < y < 4.5, assuming negligible polarisation of the J/ψ and ψ(2S) mesons. The production cross-section is measured to be 4.5 ± 0.7 ± 0.3 nb, where the frst uncertainty is statistical and the second systematic. The diferential cross-sections are measured as functions of several kinematic variables of the J/ψ-ψ(2S) candidates. The results are combined with a measurement of J/ψ-J/ψ production, giving a cross-section ratio between J/ψ-ψ(2S) and J/ψ-J/ψ production of 0.274 ± 0.044 ± 0.008, where the frst uncertainty is statistical and the second systematic.
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COMERMA MONTELLS, Albert, GARCIA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIOVENTÙ, Alessandra, GIRONELLA GIRONELL, Pere, GOMEZ FERNANDEZ, Sergio, GRAUGÉS POUS, Eugeni, LOBO SALVIA, Aniol, LÓPEZ HUERTAS, Albert, MANERA ESCALERO, Rafel, MARIN BENITO, Carla, MAURICIO FERRE, Joan, ALFONSO ALBERO, Alejandro, VAZQUEZ GOMEZ, Ricardo, LHCb Collaboration. Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at √s = 13 TeV. _Journal of High Energy Physics_. 2024. Vol. 259. [consulta: 25 de febrer de 2026]. ISSN: 1126-6708. [Disponible a: https://hdl.handle.net/2445/221838]