The cross-section of associated J/ψ-ψ(2S) production in proton-proton collisions at a centre-of-mass energy of sqrt(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 first uncertainty is statistical and the second systematic. The differential 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 first uncertainty is statistical and the second systematic.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2024). Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at sqrt(s)=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2024(5) [10.1007/JHEP05(2024)259].

Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at sqrt(s)=13 TeV

Anelli A.;Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Gotti C.;Kirsebom V. S.;Malentacca L.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;Shields E. B.;
2024

Abstract

The cross-section of associated J/ψ-ψ(2S) production in proton-proton collisions at a centre-of-mass energy of sqrt(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 first uncertainty is statistical and the second systematic. The differential 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 first uncertainty is statistical and the second systematic.
Articolo in rivista - Articolo scientifico
Hadron-Hadron Scattering; Multi-Parton Interactions; QCD; Quarkonium;
English
23-mag-2024
2024
2024
5
259
open
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adeva, B., et al. (2024). Measurement of associated J/ψ-ψ(2S) production cross-section in pp collisions at sqrt(s)=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2024(5) [10.1007/JHEP05(2024)259].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/530245
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