The production cross-section of the χc1(3872) state relative to the ψ(2S) meson is measured using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of √s = 8 and 13 TeV, corresponding to integrated luminosities of 2.0 and 5.4 fb^−1, respectively. The two mesons are reconstructed in the J/ψ π+ π− final state. The ratios of the prompt and nonprompt χc1(3872) to ψ(2S) production cross-sections are measured as a function of transverse momentum, p_T, and rapidity, y, of the χc1(3872) and ψ(2S) states, in the kinematic range 4 < p_T < 20 GeV/c and 2.0 < y < 4.5. The prompt ratio is found to increase with p_T, independently of y. For the prompt component, the double ratio of the χc1(3872) and ψ(2S) production cross-sections between 13 and 8 TeV is observed to be consistent with unity, independent of p_T and centre-of-mass energy.

Measurement of χc1(3872) Production in Proton-Proton Collisions at √s = 8 and 13 TeV

Calabrese, R.;Capriotti, L.;Couturier, B.;Fiorini, M.;Franzoso, E.;Giugliano, C.;Guarise, M.;Kotriakhova, S.;Luppi, E.;Neri, I.;Okamura, S.;Pappalardo, L. L.;Passalacqua, B.;Tomassetti, L.;
2022

Abstract

The production cross-section of the χc1(3872) state relative to the ψ(2S) meson is measured using proton-proton collision data collected with the LHCb experiment at centre-of-mass energies of √s = 8 and 13 TeV, corresponding to integrated luminosities of 2.0 and 5.4 fb^−1, respectively. The two mesons are reconstructed in the J/ψ π+ π− final state. The ratios of the prompt and nonprompt χc1(3872) to ψ(2S) production cross-sections are measured as a function of transverse momentum, p_T, and rapidity, y, of the χc1(3872) and ψ(2S) states, in the kinematic range 4 < p_T < 20 GeV/c and 2.0 < y < 4.5. The prompt ratio is found to increase with p_T, independently of y. For the prompt component, the double ratio of the χc1(3872) and ψ(2S) production cross-sections between 13 and 8 TeV is observed to be consistent with unity, independent of p_T and centre-of-mass energy.
2022
Aaij, R.; Abdelmotteleb, A. S. W.; Abellán Beteta, C.; Abudinen Gallego, F. J.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Agapopoulou, C....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2500473
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