Электронный каталог

Статья

Acharya, S.
Prompt and Non-Prompt J/*q Production at Midrapidity in Pb-Pb Collisions at *%s&sub(NN)=5.02 TeV / S.Acharya, B.Batyunya, C.Ceballos Sanchez, R.A.Diaz, S.Grigoryan, A.Kondratyev, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.] // Journal of High Energy Physics [Electronic resource]. – 2024. – Vol. 2024, No. 2. – P. 066. – URL: https://doi.org/10.1007/JHEP02(2024)066. – Bibliogr.: 114.

The transverse momentum (pT) and centrality dependence of the nuclear modifi- cation 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 midra- pidity (|y| < 0.9) in the transverse momentum region 1.5 < pT < 10 GeV/c. Both prompt and non-prompt J/ψ measurements indicate a significant 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 different 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.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами