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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, et al. 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. ISSN 1126-6708. [consulta: 8 de maig de 2026]. Disponible a: https://hdl.handle.net/2445/221838