The transverse momentum (pT) and centrality dependence of the nuclear modifcation factor RAA of prompt and non-prompt J/ψ, the latter originating from the weak decays of beauty hadrons, have been measured by the ALICE collaboration in Pb–Pb collisions at √ sNN = 5.02 TeV. The measurements are carried out through the e +e − decay channel at midrapidity (|y| < 0.9) in the transverse momentum region 1.5 < pT < 10 GeV/c. Both prompt and non-prompt J/ψ measurements indicate a signifcant suppression for pT > 5 GeV/c, which becomes stronger with increasing collision centrality. The results are consistent with similar LHC measurements in the overlapping pT intervals, and cover the kinematic region down to pT = 1.5 GeV/c at midrapidity, not accessible by other LHC experiments. The suppression of prompt J/ψ in central and semicentral collisions exhibits a decreasing trend towards lower transverse momentum, described within uncertainties by models implementing J/ψ production from recombination of c and c quarks produced independently in diferent partonic scatterings. At high transverse momentum, transport models including quarkonium dissociation are able to describe the suppression for prompt J/ψ. For non-prompt J/ψ, the suppression predicted by models including both collisional and radiative processes for the computation of the beauty-quark energy loss inside the quark-gluon plasma is consistent with measurements within uncertainties.

Null, N., Acharya, S., Adamová, D., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2024). Prompt and non-prompt J/ψ production at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2024(2), 1-39 [10.1007/jhep02(2024)066].

Prompt and non-prompt J/ψ production at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV

Alici, A.;Arcelli, S.;Bellini, F.;Carnesecchi, F.;Colocci, M.;Ercolessi, F.;Jacazio, N.;Malfattore, G.;Rubini, N.;Scioli, G.;Strazzi, S.;
2024

Abstract

The transverse momentum (pT) and centrality dependence of the nuclear modifcation factor RAA of prompt and non-prompt J/ψ, the latter originating from the weak decays of beauty hadrons, have been measured by the ALICE collaboration in Pb–Pb collisions at √ sNN = 5.02 TeV. The measurements are carried out through the e +e − decay channel at midrapidity (|y| < 0.9) in the transverse momentum region 1.5 < pT < 10 GeV/c. Both prompt and non-prompt J/ψ measurements indicate a signifcant suppression for pT > 5 GeV/c, which becomes stronger with increasing collision centrality. The results are consistent with similar LHC measurements in the overlapping pT intervals, and cover the kinematic region down to pT = 1.5 GeV/c at midrapidity, not accessible by other LHC experiments. The suppression of prompt J/ψ in central and semicentral collisions exhibits a decreasing trend towards lower transverse momentum, described within uncertainties by models implementing J/ψ production from recombination of c and c quarks produced independently in diferent partonic scatterings. At high transverse momentum, transport models including quarkonium dissociation are able to describe the suppression for prompt J/ψ. For non-prompt J/ψ, the suppression predicted by models including both collisional and radiative processes for the computation of the beauty-quark energy loss inside the quark-gluon plasma is consistent with measurements within uncertainties.
2024
Null, N., Acharya, S., Adamová, D., Aglieri Rinella, G., Agnello, M., Agrawal, N., et al. (2024). Prompt and non-prompt J/ψ production at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2024(2), 1-39 [10.1007/jhep02(2024)066].
Null, Null; Acharya, S.; Adamová, D.; Aglieri Rinella, G.; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmad, S.; Ahn, S. U.; Ahuja, I.; Akindinov, A.; Al-...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1011006
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