Электронный каталог

Статья

Acharya, S.
Measurement of Correlations Among Net-Charge, Net-Proton, and Net-Kaon Multiplicity Distributions in Pb-Pb Collisions at *%s&sub(NN)=5.02 TeV / S.Acharya, B.Batyunya, R.A.Diaz, S.Grigoryan, A.Kondratyev, A.Kuznetsov, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.]. – Text : electronic // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 8. – P. 210. – URL: https://doi.org/10.1007/JHEP08(2025)210. – Bibliogr.: 89.

Correlations among conserved quantum numbers, such as the net-electric charge, the net-baryon, and the net-strangeness in heavy-ion collisions, are crucial for exploring the QCD phase diagram. In this paper, these correlations are investigated using net-proton number (as a proxy for the net-baryon), net-kaon number (for the net-strangeness), and net-charged particle number in Pb-Pb collisions at √ s&sub(NN) = 5.02 TeV with the ALICE detector. The observed correlations deviate from the Poissonian baseline, with a more pronounced deviation at LHC energies than at RHIC. Theoretical calculations of the Thermal-FIST hadron resonance gas model, HIJING, and EPOS LHC event generators are compared with experimental results, where a signifcant impact of resonance decays is observed. ThermalFIST calculations under the grand canonical and canonical ensembles highlight signifcant diferences, underscoring the role of local charge conservation in explaining the data. Recent lattice QCD studies have demonstrated that the magnetic feld generated by spectator protons in heavy-ion collisions afects susceptibility ratios, in particular those related to the net-electric charge and the net-baryon numbers. The experimental fndings are in qualitative agreement with the expectations of lattice QCD.



ОИЯИ = ОИЯИ (JINR)2025