Abstract
We investigate the effect of the dynamical recombination of quarks on the correlations and fluctuations of conserved charges within the quark molecular dynamics (qMD) model. Charged particles ratio fluctuations, charge transfer fluctuations and the baryon number–strangeness correlation coefficient CBS are computed as a function of time from a sample of central Au+Au qMD events at AGeV. We show that all studied observables, initially compatible with the quark phase expectation values, vanish with time to the hadronic result. We trace back the disappearance of the signals to the recombination–hadronization procedure implemented in qMD. Various ratios of susceptibilities (or conversely the ratios of correlations over fluctuations) were recently measured on the lattice and can allow us to distinguish between different models of heavy ion collisions. We show that the qMD model yields a reasonable agreement with these calculations.
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