Hadronization effects on the baryon-strangeness correlation in quark combination models

Abstract

The baryon-strangeness correlation in the hadronization of the quark matter is studied within the quark combination mechanism. We calculate the correlation coefficient $C_{BS}=-3(⟨BS⟩-⟨B⟩⟨S⟩)/(⟨S^2⟩-⟨S{⟩}^2)$ of initial hadrons produced from the deconfined free quark system with $C_{BS}^{(q)}=1$. The competition of the production of baryons against that of mesons is the key dynamics that is most relevant to the change of baryon-strangeness correlation during system hadronization. Results of quark combination under the Poisson statistics agree with the statistical model predictions for a hadron resonance gas at vanishing chemical potential but differ from those at relatively large chemical potentials. Results beyond Poisson statistics are also obtained and are compared with calculations of Lattice QCD in the phase boundary, giving the best agreement at temperature $T=163$ MeV. We predict the dependence of the $C_{BS}$ of hadron system on the baryon chemical potential and strangeness. These predictions are expected to be tested by the future Lattice QCD calculations at non-zero chemical potentials and/or by the Beam Energy Scan experiment of STAR Collaboration at RHIC.

10 pages, 6 figures

References in corpus (23)

• K${}_{\mathrm{S}}^0$ and $\mathrm{\Lambda }$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Probing freeze-out conditions in heavy ion collisions with moments of charge fluctuations
• Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Freeze-out Conditions in Heavy Ion Collisions from QCD Thermodynamics
• Coalescence Models For Hadron Formation From Quark Gluon Plasma
• The QCD phase diagram at nonzero quark density
• Freeze-out conditions from net-proton and net-charge fluctuations at RHIC
• Additional Strange Hadrons from QCD Thermodynamics and Strangeness Freeze-out in Heavy Ion Collisions
• Freeze-out parameters: lattice meets experiment
• Is there a flavor hierarchy in the deconfinement transition of QCD?
• Freeze-out parameters from electric charge and baryon number fluctuations: is there consistency?
• Hadron yields and the phase diagram of strongly interacting matter
• Centrality dependence of hadronization and chemical freeze-out conditions in heavy ion collisions at \sqrt s_{NN} = 2.76 TeV
• Strange freezeout
• Hadron production by quark combination in central Pb+Pb collisions at $\sqrt{s_{NN}}=17.3$ GeV
• Entropy of expanding QCD matter
• The Effect of Dynamical Parton Recombination on Event-by-Event Observables
• Yield correlations and $p_T$ dependence of charm hadrons in Pb + Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV
• The influence of net-quarks on the yields and rapidity spectra of identified hadrons
• Robustness of baryon-strangeness correlation and related ratios of susceptibilities
• Baryon-anti-baryon Flavor Correlation in Quark Combination Models in Heavy Ion Collisions
• Baryon-Strangeness correlations in Parton/Hadron transport model for Au + Au collisions at \sqrt{s_{NN}} = 200 GeV
• Hadron Correlations and Parton Recombination

Cited by in corpus (3)

• Quark number scaling of $p_T$ spectra for $\Omega$ and $\varphi$ in relativistic heavy-ion collisions
• Strange hadron production in a quark combination model in Au+Au collisions at RHIC energies
• Statistical method in quark combination model